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Subject[GIT PULL] final round of SCSI updates for the 4.14+ merge window
From
Date
Two basic fixes: one for the sparse problem with the blacklist flags
and another for a hang forever in bnx2i.

The patch is available here:

git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi.git scsi-fixes

The short changelog is:

Chad Dupuis (1):
scsi: bnx2fc: Fix hung task messages when a cleanup response is not received during abort

Hannes Reinecke (1):
scsi: Use 'blist_flags_t' for scsi_devinfo flags

And the diffstat:

drivers/scsi/bnx2fc/bnx2fc_io.c | 40 ++++++++++++++++++++++++++-------
drivers/scsi/scsi_devinfo.c | 18 +++++++--------
drivers/scsi/scsi_priv.h | 15 +++++++------
drivers/scsi/scsi_scan.c | 2 +-
include/scsi/scsi_device.h | 4 +++-
include/scsi/scsi_devinfo.h | 50 ++++++++++++++++++++---------------------
6 files changed, 78 insertions(+), 51 deletions(-)

With full diff below.

James

---

diff --git a/drivers/scsi/bnx2fc/bnx2fc_io.c b/drivers/scsi/bnx2fc/bnx2fc_io.c
index 5b6153f23f01..8e2f767147cb 100644
--- a/drivers/scsi/bnx2fc/bnx2fc_io.c
+++ b/drivers/scsi/bnx2fc/bnx2fc_io.c
@@ -1084,24 +1084,35 @@ static int bnx2fc_abts_cleanup(struct bnx2fc_cmd *io_req)
{
struct bnx2fc_rport *tgt = io_req->tgt;
int rc = SUCCESS;
+ unsigned int time_left;

io_req->wait_for_comp = 1;
bnx2fc_initiate_cleanup(io_req);

spin_unlock_bh(&tgt->tgt_lock);

- wait_for_completion(&io_req->tm_done);
-
+ /*
+ * Can't wait forever on cleanup response lest we let the SCSI error
+ * handler wait forever
+ */
+ time_left = wait_for_completion_timeout(&io_req->tm_done,
+ BNX2FC_FW_TIMEOUT);
io_req->wait_for_comp = 0;
+ if (!time_left)
+ BNX2FC_IO_DBG(io_req, "%s(): Wait for cleanup timed out.\n",
+ __func__);
+
/*
- * release the reference taken in eh_abort to allow the
- * target to re-login after flushing IOs
+ * Release reference held by SCSI command the cleanup completion
+ * hits the BNX2FC_CLEANUP case in bnx2fc_process_cq_compl() and
+ * thus the SCSI command is not returnedi by bnx2fc_scsi_done().
*/
kref_put(&io_req->refcount, bnx2fc_cmd_release);

spin_lock_bh(&tgt->tgt_lock);
return rc;
}
+
/**
* bnx2fc_eh_abort - eh_abort_handler api to abort an outstanding
* SCSI command
@@ -1118,6 +1129,7 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
struct fc_lport *lport;
struct bnx2fc_rport *tgt;
int rc;
+ unsigned int time_left;

rc = fc_block_scsi_eh(sc_cmd);
if (rc)
@@ -1194,6 +1206,11 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
if (cancel_delayed_work(&io_req->timeout_work))
kref_put(&io_req->refcount,
bnx2fc_cmd_release); /* drop timer hold */
+ /*
+ * We don't want to hold off the upper layer timer so simply
+ * cleanup the command and return that I/O was successfully
+ * aborted.
+ */
rc = bnx2fc_abts_cleanup(io_req);
/* This only occurs when an task abort was requested while ABTS
is in progress. Setting the IO_CLEANUP flag will skip the
@@ -1201,7 +1218,7 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
was a result from the ABTS request rather than the CLEANUP
request */
set_bit(BNX2FC_FLAG_IO_CLEANUP, &io_req->req_flags);
- goto out;
+ goto done;
}

/* Cancel the current timer running on this io_req */
@@ -1221,7 +1238,11 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
}
spin_unlock_bh(&tgt->tgt_lock);

- wait_for_completion(&io_req->tm_done);
+ /* Wait 2 * RA_TOV + 1 to be sure timeout function hasn't fired */
+ time_left = wait_for_completion_timeout(&io_req->tm_done,
+ (2 * rp->r_a_tov + 1) * HZ);
+ if (time_left)
+ BNX2FC_IO_DBG(io_req, "Timed out in eh_abort waiting for tm_done");

spin_lock_bh(&tgt->tgt_lock);
io_req->wait_for_comp = 0;
@@ -1233,8 +1254,12 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
/* Let the scsi-ml try to recover this command */
printk(KERN_ERR PFX "abort failed, xid = 0x%x\n",
io_req->xid);
+ /*
+ * Cleanup firmware residuals before returning control back
+ * to SCSI ML.
+ */
rc = bnx2fc_abts_cleanup(io_req);
- goto out;
+ goto done;
} else {
/*
* We come here even when there was a race condition
@@ -1249,7 +1274,6 @@ int bnx2fc_eh_abort(struct scsi_cmnd *sc_cmd)
done:
/* release the reference taken in eh_abort */
kref_put(&io_req->refcount, bnx2fc_cmd_release);
-out:
spin_unlock_bh(&tgt->tgt_lock);
return rc;
}
diff --git a/drivers/scsi/scsi_devinfo.c b/drivers/scsi/scsi_devinfo.c
index fe5a9ea27b5e..78d4aa8df675 100644
--- a/drivers/scsi/scsi_devinfo.c
+++ b/drivers/scsi/scsi_devinfo.c
@@ -22,7 +22,7 @@ struct scsi_dev_info_list {
struct list_head dev_info_list;
char vendor[8];
char model[16];
- unsigned flags;
+ blist_flags_t flags;
unsigned compatible; /* for use with scsi_static_device_list entries */
};

@@ -35,7 +35,7 @@ struct scsi_dev_info_list_table {


static const char spaces[] = " "; /* 16 of them */
-static unsigned scsi_default_dev_flags;
+static blist_flags_t scsi_default_dev_flags;
static LIST_HEAD(scsi_dev_info_list);
static char scsi_dev_flags[256];

@@ -52,7 +52,7 @@ static struct {
char *vendor;
char *model;
char *revision; /* revision known to be bad, unused */
- unsigned flags;
+ blist_flags_t flags;
} scsi_static_device_list[] __initdata = {
/*
* The following devices are known not to tolerate a lun != 0 scan
@@ -335,7 +335,7 @@ static void scsi_strcpy_devinfo(char *name, char *to, size_t to_length,
* Returns: 0 OK, -error on failure.
**/
static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
- char *strflags, int flags)
+ char *strflags, blist_flags_t flags)
{
return scsi_dev_info_list_add_keyed(compatible, vendor, model,
strflags, flags,
@@ -361,7 +361,7 @@ static int scsi_dev_info_list_add(int compatible, char *vendor, char *model,
* Returns: 0 OK, -error on failure.
**/
int scsi_dev_info_list_add_keyed(int compatible, char *vendor, char *model,
- char *strflags, int flags, int key)
+ char *strflags, blist_flags_t flags, int key)
{
struct scsi_dev_info_list *devinfo;
struct scsi_dev_info_list_table *devinfo_table =
@@ -571,9 +571,9 @@ static int scsi_dev_info_list_add_str(char *dev_list)
* matching flags value, else return the host or global default
* settings. Called during scan time.
**/
-int scsi_get_device_flags(struct scsi_device *sdev,
- const unsigned char *vendor,
- const unsigned char *model)
+blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
+ const unsigned char *vendor,
+ const unsigned char *model)
{
return scsi_get_device_flags_keyed(sdev, vendor, model,
SCSI_DEVINFO_GLOBAL);
@@ -593,7 +593,7 @@ int scsi_get_device_flags(struct scsi_device *sdev,
* flags value, else return the host or global default settings.
* Called during scan time.
**/
-int scsi_get_device_flags_keyed(struct scsi_device *sdev,
+blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
const unsigned char *vendor,
const unsigned char *model,
int key)
diff --git a/drivers/scsi/scsi_priv.h b/drivers/scsi/scsi_priv.h
index df1368aea9a3..a5946cd64caa 100644
--- a/drivers/scsi/scsi_priv.h
+++ b/drivers/scsi/scsi_priv.h
@@ -50,15 +50,16 @@ enum {
SCSI_DEVINFO_SPI,
};

-extern int scsi_get_device_flags(struct scsi_device *sdev,
- const unsigned char *vendor,
- const unsigned char *model);
-extern int scsi_get_device_flags_keyed(struct scsi_device *sdev,
- const unsigned char *vendor,
- const unsigned char *model, int key);
+extern blist_flags_t scsi_get_device_flags(struct scsi_device *sdev,
+ const unsigned char *vendor,
+ const unsigned char *model);
+extern blist_flags_t scsi_get_device_flags_keyed(struct scsi_device *sdev,
+ const unsigned char *vendor,
+ const unsigned char *model,
+ int key);
extern int scsi_dev_info_list_add_keyed(int compatible, char *vendor,
char *model, char *strflags,
- int flags, int key);
+ blist_flags_t flags, int key);
extern int scsi_dev_info_list_del_keyed(char *vendor, char *model, int key);
extern int scsi_dev_info_add_list(int key, const char *name);
extern int scsi_dev_info_remove_list(int key);
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index a0f2a20ea9e9..be5e919db0e8 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -566,7 +566,7 @@ EXPORT_SYMBOL(scsi_sanitize_inquiry_string);
* are copied to the scsi_device any flags value is stored in *@bflags.
**/
static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
- int result_len, int *bflags)
+ int result_len, blist_flags_t *bflags)
{
unsigned char scsi_cmd[MAX_COMMAND_SIZE];
int first_inquiry_len, try_inquiry_len, next_inquiry_len;
diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index 1fb6ad3c5006..7ae177c8e399 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -15,6 +15,8 @@ struct scsi_cmnd;
struct scsi_lun;
struct scsi_sense_hdr;

+typedef unsigned int __bitwise blist_flags_t;
+
struct scsi_mode_data {
__u32 length;
__u16 block_descriptor_length;
@@ -141,7 +143,7 @@ struct scsi_device {
unsigned char current_tag; /* current tag */
struct scsi_target *sdev_target; /* used only for single_lun */

- unsigned int sdev_bflags; /* black/white flags as also found in
+ blist_flags_t sdev_bflags; /* black/white flags as also found in
* scsi_devinfo.[hc]. For now used only to
* pass settings from slave_alloc to scsi
* core. */
diff --git a/include/scsi/scsi_devinfo.h b/include/scsi/scsi_devinfo.h
index 3cf125b56c3a..ea67c32e870e 100644
--- a/include/scsi/scsi_devinfo.h
+++ b/include/scsi/scsi_devinfo.h
@@ -6,55 +6,55 @@
*/

/* Only scan LUN 0 */
-#define BLIST_NOLUN ((__force __u32 __bitwise)(1 << 0))
+#define BLIST_NOLUN ((__force blist_flags_t)(1 << 0))
/* Known to have LUNs, force scanning.
* DEPRECATED: Use max_luns=N */
-#define BLIST_FORCELUN ((__force __u32 __bitwise)(1 << 1))
+#define BLIST_FORCELUN ((__force blist_flags_t)(1 << 1))
/* Flag for broken handshaking */
-#define BLIST_BORKEN ((__force __u32 __bitwise)(1 << 2))
+#define BLIST_BORKEN ((__force blist_flags_t)(1 << 2))
/* unlock by special command */
-#define BLIST_KEY ((__force __u32 __bitwise)(1 << 3))
+#define BLIST_KEY ((__force blist_flags_t)(1 << 3))
/* Do not use LUNs in parallel */
-#define BLIST_SINGLELUN ((__force __u32 __bitwise)(1 << 4))
+#define BLIST_SINGLELUN ((__force blist_flags_t)(1 << 4))
/* Buggy Tagged Command Queuing */
-#define BLIST_NOTQ ((__force __u32 __bitwise)(1 << 5))
+#define BLIST_NOTQ ((__force blist_flags_t)(1 << 5))
/* Non consecutive LUN numbering */
-#define BLIST_SPARSELUN ((__force __u32 __bitwise)(1 << 6))
+#define BLIST_SPARSELUN ((__force blist_flags_t)(1 << 6))
/* Avoid LUNS >= 5 */
-#define BLIST_MAX5LUN ((__force __u32 __bitwise)(1 << 7))
+#define BLIST_MAX5LUN ((__force blist_flags_t)(1 << 7))
/* Treat as (removable) CD-ROM */
-#define BLIST_ISROM ((__force __u32 __bitwise)(1 << 8))
+#define BLIST_ISROM ((__force blist_flags_t)(1 << 8))
/* LUNs past 7 on a SCSI-2 device */
-#define BLIST_LARGELUN ((__force __u32 __bitwise)(1 << 9))
+#define BLIST_LARGELUN ((__force blist_flags_t)(1 << 9))
/* override additional length field */
-#define BLIST_INQUIRY_36 ((__force __u32 __bitwise)(1 << 10))
+#define BLIST_INQUIRY_36 ((__force blist_flags_t)(1 << 10))
/* do not do automatic start on add */
-#define BLIST_NOSTARTONADD ((__force __u32 __bitwise)(1 << 12))
+#define BLIST_NOSTARTONADD ((__force blist_flags_t)(1 << 12))
/* try REPORT_LUNS even for SCSI-2 devs (if HBA supports more than 8 LUNs) */
-#define BLIST_REPORTLUN2 ((__force __u32 __bitwise)(1 << 17))
+#define BLIST_REPORTLUN2 ((__force blist_flags_t)(1 << 17))
/* don't try REPORT_LUNS scan (SCSI-3 devs) */
-#define BLIST_NOREPORTLUN ((__force __u32 __bitwise)(1 << 18))
+#define BLIST_NOREPORTLUN ((__force blist_flags_t)(1 << 18))
/* don't use PREVENT-ALLOW commands */
-#define BLIST_NOT_LOCKABLE ((__force __u32 __bitwise)(1 << 19))
+#define BLIST_NOT_LOCKABLE ((__force blist_flags_t)(1 << 19))
/* device is actually for RAID config */
-#define BLIST_NO_ULD_ATTACH ((__force __u32 __bitwise)(1 << 20))
+#define BLIST_NO_ULD_ATTACH ((__force blist_flags_t)(1 << 20))
/* select without ATN */
-#define BLIST_SELECT_NO_ATN ((__force __u32 __bitwise)(1 << 21))
+#define BLIST_SELECT_NO_ATN ((__force blist_flags_t)(1 << 21))
/* retry HARDWARE_ERROR */
-#define BLIST_RETRY_HWERROR ((__force __u32 __bitwise)(1 << 22))
+#define BLIST_RETRY_HWERROR ((__force blist_flags_t)(1 << 22))
/* maximum 512 sector cdb length */
-#define BLIST_MAX_512 ((__force __u32 __bitwise)(1 << 23))
+#define BLIST_MAX_512 ((__force blist_flags_t)(1 << 23))
/* Disable T10 PI (DIF) */
-#define BLIST_NO_DIF ((__force __u32 __bitwise)(1 << 25))
+#define BLIST_NO_DIF ((__force blist_flags_t)(1 << 25))
/* Ignore SBC-3 VPD pages */
-#define BLIST_SKIP_VPD_PAGES ((__force __u32 __bitwise)(1 << 26))
+#define BLIST_SKIP_VPD_PAGES ((__force blist_flags_t)(1 << 26))
/* Attempt to read VPD pages */
-#define BLIST_TRY_VPD_PAGES ((__force __u32 __bitwise)(1 << 28))
+#define BLIST_TRY_VPD_PAGES ((__force blist_flags_t)(1 << 28))
/* don't try to issue RSOC */
-#define BLIST_NO_RSOC ((__force __u32 __bitwise)(1 << 29))
+#define BLIST_NO_RSOC ((__force blist_flags_t)(1 << 29))
/* maximum 1024 sector cdb length */
-#define BLIST_MAX_1024 ((__force __u32 __bitwise)(1 << 30))
+#define BLIST_MAX_1024 ((__force blist_flags_t)(1 << 30))
/* Use UNMAP limit for WRITE SAME */
-#define BLIST_UNMAP_LIMIT_WS ((__force __u32 __bitwise)(1 << 31))
+#define BLIST_UNMAP_LIMIT_WS ((__force blist_flags_t)(1 << 31))

#endif
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