[PATCH v3] scsi: fnic: Use vcalloc() instead of vmalloc() and memset(0)

From: Thorsten Blum
Date: Tue Oct 08 2024 - 07:21:21 EST


Use vcalloc() instead of vmalloc() followed by memset(0) to simplify the
functions fnic_trace_buf_init() and fnic_fc_trace_init().

Compile-tested only.

Cc: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
Signed-off-by: Thorsten Blum <thorsten.blum@xxxxxxxxx>
---
Changes in v2:
- Remove unsigned long cast as suggested by Johannes Thumshirn
- Link to v1: https://lore.kernel.org/linux-kernel/20241007115840.2239-6-thorsten.blum@xxxxxxxxx/

Changes in v3:
- Keep the unsigned long cast removed in v2
- Use vcalloc() instead of vzalloc() as suggested by Johannes Thumshirn
- Compile-tested again
- Link to v2: https://lore.kernel.org/linux-kernel/20241008095152.1831-2-thorsten.blum@xxxxxxxxx/
---
drivers/scsi/fnic/fnic_trace.c | 16 +++-------------
1 file changed, 3 insertions(+), 13 deletions(-)

diff --git a/drivers/scsi/fnic/fnic_trace.c b/drivers/scsi/fnic/fnic_trace.c
index aaa4ea02fb7c..e5e0c0492f23 100644
--- a/drivers/scsi/fnic/fnic_trace.c
+++ b/drivers/scsi/fnic/fnic_trace.c
@@ -485,8 +485,7 @@ int fnic_trace_buf_init(void)
}

fnic_trace_entries.page_offset =
- vmalloc(array_size(fnic_max_trace_entries,
- sizeof(unsigned long)));
+ vcalloc(fnic_max_trace_entries, sizeof(unsigned long));
if (!fnic_trace_entries.page_offset) {
printk(KERN_ERR PFX "Failed to allocate memory for"
" page_offset\n");
@@ -497,8 +496,6 @@ int fnic_trace_buf_init(void)
err = -ENOMEM;
goto err_fnic_trace_buf_init;
}
- memset((void *)fnic_trace_entries.page_offset, 0,
- (fnic_max_trace_entries * sizeof(unsigned long)));
fnic_trace_entries.wr_idx = fnic_trace_entries.rd_idx = 0;
fnic_buf_head = fnic_trace_buf_p;

@@ -559,8 +556,7 @@ int fnic_fc_trace_init(void)
fc_trace_max_entries = (fnic_fc_trace_max_pages * PAGE_SIZE)/
FC_TRC_SIZE_BYTES;
fnic_fc_ctlr_trace_buf_p =
- (unsigned long)vmalloc(array_size(PAGE_SIZE,
- fnic_fc_trace_max_pages));
+ (unsigned long)vcalloc(fnic_fc_trace_max_pages, PAGE_SIZE);
if (!fnic_fc_ctlr_trace_buf_p) {
pr_err("fnic: Failed to allocate memory for "
"FC Control Trace Buf\n");
@@ -568,13 +564,9 @@ int fnic_fc_trace_init(void)
goto err_fnic_fc_ctlr_trace_buf_init;
}

- memset((void *)fnic_fc_ctlr_trace_buf_p, 0,
- fnic_fc_trace_max_pages * PAGE_SIZE);
-
/* Allocate memory for page offset */
fc_trace_entries.page_offset =
- vmalloc(array_size(fc_trace_max_entries,
- sizeof(unsigned long)));
+ vcalloc(fc_trace_max_entries, sizeof(unsigned long));
if (!fc_trace_entries.page_offset) {
pr_err("fnic:Failed to allocate memory for page_offset\n");
if (fnic_fc_ctlr_trace_buf_p) {
@@ -585,8 +577,6 @@ int fnic_fc_trace_init(void)
err = -ENOMEM;
goto err_fnic_fc_ctlr_trace_buf_init;
}
- memset((void *)fc_trace_entries.page_offset, 0,
- (fc_trace_max_entries * sizeof(unsigned long)));

fc_trace_entries.rd_idx = fc_trace_entries.wr_idx = 0;
fc_trace_buf_head = fnic_fc_ctlr_trace_buf_p;
--
2.46.2