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Subject[PATCH] IDE: ide-taskfile.c fix compilation warning and cleanup
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Date

reverting f2bc316736e69e5 solves compilation warning :

CC drivers/ide/ide-taskfile.o
drivers/ide/ide-taskfile.c: In function ‘ide_pio_bytes’:
drivers/ide/ide-taskfile.c:229: warning: ‘flags’ may be used uninitialized in this function

Fix trivial style problems:

WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
WARNING: space prohibited between function name and open parenthesis '('
WARNING: EXPORT_SYMBOL(foo); should immediately follow its function/variable
ERROR: do not use C99 // comments X 2
ERROR: trailing statements should be on next line
ERROR: trailing whitespace
ERROR: switch and case should be at the same indent
WARNING: line over 80 characters

total: 5 errors, 4 warnings

Also removed dead code

Also used pr_err() to avoid line breaks

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
---
drivers/ide/ide-taskfile.c | 121 +++++++++++++++++++++----------------------
1 files changed, 59 insertions(+), 62 deletions(-)

diff --git a/drivers/ide/ide-taskfile.c b/drivers/ide/ide-taskfile.c
index 4aa6223..dd3c12c 100644
--- a/drivers/ide/ide-taskfile.c
+++ b/drivers/ide/ide-taskfile.c
@@ -19,8 +19,8 @@
#include <linux/hdreg.h>
#include <linux/ide.h>
#include <linux/scatterlist.h>
+#include <linux/uaccess.h>

-#include <asm/uaccess.h>
#include <asm/io.h>

void ide_tf_readback(ide_drive_t *drive, struct ide_cmd *cmd)
@@ -53,7 +53,7 @@ void ide_tf_dump(const char *s, struct ide_cmd *cmd)
#endif
}

-int taskfile_lib_get_identify (ide_drive_t *drive, u8 *buf)
+int taskfile_lib_get_identify(ide_drive_t *drive, u8 *buf)
{
struct ide_cmd cmd;

@@ -86,7 +86,7 @@ ide_startstop_t do_rw_taskfile(ide_drive_t *drive, struct ide_cmd *orig_cmd)
if (orig_cmd->protocol == ATA_PROT_PIO &&
(orig_cmd->tf_flags & IDE_TFLAG_MULTI_PIO) &&
drive->mult_count == 0) {
- printk(KERN_ERR "%s: multimode not set!\n", drive->name);
+ pr_err("%s: multimode not set!\n", drive->name);
return ide_stopped;
}

@@ -215,7 +215,7 @@ static u8 wait_drive_not_busy(ide_drive_t *drive)
}

if (stat & ATA_BUSY)
- printk(KERN_ERR "%s: drive still BUSY!\n", drive->name);
+ pr_err("%s: drive still BUSY!\n", drive->name);

return stat;
}
@@ -227,7 +227,9 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
struct scatterlist *sg = hwif->sg_table;
struct scatterlist *cursg = cmd->cursg;
struct page *page;
+#ifdef CONFIG_HIGHMEM
unsigned long flags;
+#endif
unsigned int offset;
u8 *buf;

@@ -248,8 +250,9 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,
page = nth_page(page, (offset >> PAGE_SHIFT));
offset %= PAGE_SIZE;

- if (PageHighMem(page))
- local_irq_save(flags);
+#ifdef CONFIG_HIGHMEM
+ local_irq_save(flags);
+#endif

buf = kmap_atomic(page, KM_BIO_SRC_IRQ) + offset;

@@ -269,8 +272,9 @@ void ide_pio_bytes(ide_drive_t *drive, struct ide_cmd *cmd,

kunmap_atomic(buf, KM_BIO_SRC_IRQ);

- if (PageHighMem(page))
- local_irq_restore(flags);
+#ifdef CONFIG_HIGHMEM
+ local_irq_restore(flags);
+#endif

len -= nr_bytes;
}
@@ -399,8 +403,7 @@ static ide_startstop_t pre_task_out_intr(ide_drive_t *drive,

if (ide_wait_stat(&startstop, drive, ATA_DRQ,
drive->bad_wstat, WAIT_DRQ)) {
- printk(KERN_ERR "%s: no DRQ after issuing %sWRITE%s\n",
- drive->name,
+ pr_err("%s: no DRQ after issuing %sWRITE%s\n", drive->name,
(cmd->tf_flags & IDE_TFLAG_MULTI_PIO) ? "MULT" : "",
(drive->dev_flags & IDE_DFLAG_LBA48) ? "_EXT" : "");
return startstop;
@@ -446,7 +449,6 @@ int ide_raw_taskfile(ide_drive_t *drive, struct ide_cmd *cmd, u8 *buf,

return error;
}
-
EXPORT_SYMBOL(ide_raw_taskfile);

int ide_no_data_taskfile(ide_drive_t *drive, struct ide_cmd *cmd)
@@ -472,10 +474,9 @@ int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
u16 nsect = 0;
char __user *buf = (char __user *)arg;

-// printk("IDE Taskfile ...\n");
-
req_task = kzalloc(tasksize, GFP_KERNEL);
- if (req_task == NULL) return -ENOMEM;
+ if (req_task == NULL)
+ return -ENOMEM;
if (copy_from_user(req_task, buf, tasksize)) {
kfree(req_task);
return -EFAULT;
@@ -483,7 +484,7 @@ int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)

taskout = req_task->out_size;
taskin = req_task->in_size;
-
+
if (taskin > 65536 || taskout > 65536) {
err = -EINVAL;
goto abort;
@@ -573,51 +574,49 @@ int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
cmd.protocol = ATA_PROT_DMA;

switch (req_task->data_phase) {
- case TASKFILE_MULTI_OUT:
- if (!drive->mult_count) {
- /* (hs): give up if multcount is not set */
- printk(KERN_ERR "%s: %s Multimode Write " \
- "multcount is not set\n",
- drive->name, __func__);
- err = -EPERM;
- goto abort;
- }
- cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
- /* fall through */
- case TASKFILE_OUT:
- cmd.protocol = ATA_PROT_PIO;
- /* fall through */
- case TASKFILE_OUT_DMAQ:
- case TASKFILE_OUT_DMA:
- cmd.tf_flags |= IDE_TFLAG_WRITE;
- nsect = taskout / SECTOR_SIZE;
- data_buf = outbuf;
- break;
- case TASKFILE_MULTI_IN:
- if (!drive->mult_count) {
- /* (hs): give up if multcount is not set */
- printk(KERN_ERR "%s: %s Multimode Read failure " \
- "multcount is not set\n",
- drive->name, __func__);
- err = -EPERM;
- goto abort;
- }
- cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
- /* fall through */
- case TASKFILE_IN:
- cmd.protocol = ATA_PROT_PIO;
- /* fall through */
- case TASKFILE_IN_DMAQ:
- case TASKFILE_IN_DMA:
- nsect = taskin / SECTOR_SIZE;
- data_buf = inbuf;
- break;
- case TASKFILE_NO_DATA:
- cmd.protocol = ATA_PROT_NODATA;
- break;
- default:
- err = -EFAULT;
+ case TASKFILE_MULTI_OUT:
+ if (!drive->mult_count) {
+ /* (hs): give up if multcount is not set */
+ pr_err("%s: %s Multimode Write multcount is not set\n",
+ drive->name, __func__);
+ err = -EPERM;
+ goto abort;
+ }
+ cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
+ /* fall through */
+ case TASKFILE_OUT:
+ cmd.protocol = ATA_PROT_PIO;
+ /* fall through */
+ case TASKFILE_OUT_DMAQ:
+ case TASKFILE_OUT_DMA:
+ cmd.tf_flags |= IDE_TFLAG_WRITE;
+ nsect = taskout / SECTOR_SIZE;
+ data_buf = outbuf;
+ break;
+ case TASKFILE_MULTI_IN:
+ if (!drive->mult_count) {
+ /* (hs): give up if multcount is not set */
+ pr_err("%s: %s Multimode Read multcount is not set\n",
+ drive->name, __func__);
+ err = -EPERM;
goto abort;
+ }
+ cmd.tf_flags |= IDE_TFLAG_MULTI_PIO;
+ /* fall through */
+ case TASKFILE_IN:
+ cmd.protocol = ATA_PROT_PIO;
+ /* fall through */
+ case TASKFILE_IN_DMAQ:
+ case TASKFILE_IN_DMA:
+ nsect = taskin / SECTOR_SIZE;
+ data_buf = inbuf;
+ break;
+ case TASKFILE_NO_DATA:
+ cmd.protocol = ATA_PROT_NODATA;
+ break;
+ default:
+ err = -EFAULT;
+ goto abort;
}

if (req_task->req_cmd == IDE_DRIVE_TASK_NO_DATA)
@@ -626,7 +625,7 @@ int ide_taskfile_ioctl(ide_drive_t *drive, unsigned long arg)
nsect = (cmd.hob.nsect << 8) | cmd.tf.nsect;

if (!nsect) {
- printk(KERN_ERR "%s: in/out command without data\n",
+ pr_err("%s: in/out command without data\n",
drive->name);
err = -EFAULT;
goto abort;
@@ -668,8 +667,6 @@ abort:
kfree(outbuf);
kfree(inbuf);

-// printk("IDE Taskfile ioctl ended. rc = %i\n", err);
-
return err;
}
#endif
--
1.6.0.6


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