OpenCloudOS-Kernel/drivers/scsi/bnx2i
Rasmus Villemoes adb253433d scsi: bnx2i: Make bnx2i_process_iscsi_error() simpler and more robust
Instead of strcpy'ing into a stack buffer, just let additional_notice point
to a string literal living in .rodata. This is better in a few ways:

 - Smaller .text - instead of gcc compiling the strcpys as a bunch of
   immediate stores (effectively encoding the string literal in the
   instruction stream), we only pay the price of storing the literal in
   .rodata.

 - Faster, because there's no string copying.

 - Smaller stack usage (with my compiler, 72 bytes instead of 176 for the
   sole caller, bnx2i_indicate_kcqe)

Moreover, it's currently possible for additional_notice[] to get used
uninitialized, so some random stack garbage would be passed to printk() -
in the worst case without any '\0' anywhere in those 64 bytes. That could
be fixed by initializing additional_notice[0], but the same is achieved
here by initializing the new pointer variable to "".

Also give the message pointer a similar treatment - there's no point making
temporary copies on the stack of those two strings.

Link: https://lore.kernel.org/r/20210310221602.2494422-1-linux@rasmusvillemoes.dk
Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2021-03-24 22:21:31 -04:00
..
57xx_iscsi_constants.h bnx2i: Rebranding bnx2i driver 2014-07-25 17:16:59 -04:00
57xx_iscsi_hsi.h bnx2i: Rebranding bnx2i driver 2014-07-25 17:16:59 -04:00
Kconfig scsi: bnx2i: Requires MMU 2020-12-02 12:59:04 -05:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
bnx2i.h scsi: bnx2i: Convert timers to use timer_setup() 2017-10-27 02:22:00 -07:00
bnx2i_hwi.c scsi: bnx2i: Make bnx2i_process_iscsi_error() simpler and more robust 2021-03-24 22:21:31 -04:00
bnx2i_init.c scsi: bnx2i: Remove unnecessary mutex_init() 2020-09-22 20:21:02 -04:00
bnx2i_iscsi.c scsi: libiscsi: Fix iscsi_task use after free() 2021-02-08 22:39:03 -05:00
bnx2i_sysfs.c scsi: bnx2i: Fix bnx2i_set_ccell_info()'s name in description 2021-03-15 22:28:59 -04:00