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Subject[PATCH v4 1/8] Staging: rts5208: rtsx_transport.c: Cleanup comments
Date
This patch fixes all multiline comments to conform to the coding style,
which states that multiline comments should start with "/*" and end
with "*/" on a separate line.

Also cleans up some comments to make them more clear and/or reflect what
the code is doing.

Signed-off-by: Shaun Ren <shaun.ren@linux.com>
---
Changes since v3
* Removed the extraneous SCSI comment in the first patch in
rtsx_stor_access_xfer_buf()

Changes since v2
* Cleaned up comments as per Joshua Clayton's suggestions

drivers/staging/rts5208/rtsx_transport.c | 53 ++++++++++++++++----------------
1 file changed, 27 insertions(+), 26 deletions(-)

diff --git a/drivers/staging/rts5208/rtsx_transport.c b/drivers/staging/rts5208/rtsx_transport.c
index f2eb18e..91fdccf 100644
--- a/drivers/staging/rts5208/rtsx_transport.c
+++ b/drivers/staging/rts5208/rtsx_transport.c
@@ -1,4 +1,5 @@
-/* Driver for Realtek PCI-Express card reader
+/*
+ * Driver for Realtek PCI-Express card reader
*
* Copyright(c) 2009-2013 Realtek Semiconductor Corp. All rights reserved.
*
@@ -30,13 +31,15 @@
* Scatter-gather transfer buffer access routines
***********************************************************************/

-/* Copy a buffer of length buflen to/from the srb's transfer buffer.
+/*
+ * Copy a buffer of length buflen to/from the srb's transfer buffer.
* (Note: for scatter-gather transfers (srb->use_sg > 0), srb->request_buffer
* points to a list of s-g entries and we ignore srb->request_bufflen.
* For non-scatter-gather transfers, srb->request_buffer points to the
* transfer buffer itself and srb->request_bufflen is the buffer's length.)
* Update the *index and *offset variables so that the next copy will
- * pick up from where this one left off. */
+ * pick up from where this one left off.
+ */

unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
unsigned int buflen, struct scsi_cmnd *srb, unsigned int *index,
@@ -44,8 +47,7 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
{
unsigned int cnt;

- /* If not using scatter-gather, just transfer the data directly.
- * Make certain it will fit in the available buffer space. */
+ /* If not using scatter-gather, just transfer the data directly. */
if (scsi_sg_count(srb) == 0) {
if (*offset >= scsi_bufflen(srb))
return 0;
@@ -58,22 +60,22 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
*offset, cnt);
*offset += cnt;

- /* Using scatter-gather. We have to go through the list one entry
+ /*
+ * Using scatter-gather. We have to go through the list one entry
* at a time. Each s-g entry contains some number of pages, and
- * each page has to be kmap()'ed separately. If the page is already
- * in kernel-addressable memory then kmap() will return its address.
- * If the page is not directly accessible -- such as a user buffer
- * located in high memory -- then kmap() will map it to a temporary
- * position in the kernel's virtual address space. */
+ * each page has to be kmap()'ed separately.
+ */
} else {
struct scatterlist *sg =
(struct scatterlist *) scsi_sglist(srb)
+ *index;

- /* This loop handles a single s-g list entry, which may
+ /*
+ * This loop handles a single s-g list entry, which may
* include multiple pages. Find the initial page structure
* and the starting offset within the page, and update
- * the *offset and *index values for the next loop. */
+ * the *offset and *index values for the next loop.
+ */
cnt = 0;
while (cnt < buflen && *index < scsi_sg_count(srb)) {
struct page *page = sg_page(sg) +
@@ -95,9 +97,6 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
++sg;
}

- /* Transfer the data for all the pages in this
- * s-g entry. For each page: call kmap(), do the
- * transfer, and call kunmap() immediately after. */
while (sglen > 0) {
unsigned int plen = min(sglen, (unsigned int)
PAGE_SIZE - poff);
@@ -122,8 +121,10 @@ unsigned int rtsx_stor_access_xfer_buf(unsigned char *buffer,
return cnt;
}

-/* Store the contents of buffer into srb's transfer buffer and set the
-* SCSI residue. */
+/*
+ * Store the contents of buffer into srb's transfer buffer and set the
+ * SCSI residue.
+ */
void rtsx_stor_set_xfer_buf(unsigned char *buffer,
unsigned int buflen, struct scsi_cmnd *srb)
{
@@ -151,7 +152,8 @@ void rtsx_stor_get_xfer_buf(unsigned char *buffer,
* Transport routines
***********************************************************************/

-/* Invoke the transport and basic error-handling/recovery methods
+/*
+ * Invoke the transport and basic error-handling/recovery methods
*
* This is used to send the message to the device and receive the response.
*/
@@ -161,8 +163,9 @@ void rtsx_invoke_transport(struct scsi_cmnd *srb, struct rtsx_chip *chip)

result = rtsx_scsi_handler(srb, chip);

- /* if the command gets aborted by the higher layers, we need to
- * short-circuit all other processing
+ /*
+ * if the command gets aborted by the higher layers, we need to
+ * short-circuit all other processing.
*/
if (rtsx_chk_stat(chip, RTSX_STAT_ABORT)) {
dev_dbg(rtsx_dev(chip), "-- command was aborted\n");
@@ -194,9 +197,6 @@ void rtsx_invoke_transport(struct scsi_cmnd *srb, struct rtsx_chip *chip)

return;

- /* Error and abort processing: try to resynchronize with the device
- * by issuing a port reset. If that fails, try a class-specific
- * device reset. */
Handle_Errors:
return;
}
@@ -368,10 +368,11 @@ static int rtsx_transfer_sglist_adma_partial(struct rtsx_chip *chip, u8 card,
resid = size;
sg_ptr = sg;
chip->sgi = 0;
- /* Usually the next entry will be @sg@ + 1, but if this sg element
+ /*
+ * Usually the next entry will be @sg@ + 1, but if this sg element
* is part of a chained scatterlist, it could jump to the start of
* a new scatterlist array. So here we use sg_next to move to
- * the proper sg
+ * the proper sg.
*/
for (i = 0; i < *index; i++)
sg_ptr = sg_next(sg_ptr);
--
2.7.0
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