[PATCH 4/4] crypto: caamhash: replace kmalloc with kzalloc

From: yanjiang.jin
Date: Sat Feb 28 2015 - 01:02:22 EST

From: Yanjiang Jin <yanjiang.jin@xxxxxxxxxxxxx>

This can make sure we get a clean memory, else system would report
the below warning:

caam_jr ffe301000.jr: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0xdeadbeefdeadbeef] [size=18446744073150512879 bytes]
------------[ cut here ]------------
WARNING: at lib/dma-debug.c:877
Modules linked in:
CPU: 1 PID: 98 Comm: cryptomgr_test Not tainted 3.10.62-ltsi-WR6.0.0.0_standard #175
task: c0000000f74bc400 ti: c0000000fffd0000 task.ti: c0000000f775c000
NIP: c0000000004f5ed8 LR: c0000000004f5ed4 CTR: c00000000055a160
REGS: c0000000fffd3650 TRAP: 0700 Not tainted (3.10.62-ltsi-WR6.0.0.0_standard)
MSR: 0000000080029000 <CE,EE,ME> CR: 24a48e84 XER: 00000000
SOFTE: 1

004f5ed4 c0000000fffd38d0 c0000000012af348 00000000000000a0
24a48e84 0000000000000000 c00000000125f1c8 00000000000001eb
00000060 0000000000000001 0000000010187373 0000000000000020
000001eb c000000001fff780 c0000000011ac928 c00000007f003028
00000097 0000000000000098 0000000000000098 c0000000f7758800
f7098c00 0000000000000001 0000000000000001 000000000000003f
f7098c00 0000000000000014 c00000007f003000 c0000000011b0e98
00000000 c000000001565b80 c0000000fffd39e0 c0000000f72f2410
NIP [c0000000004f5ed8] .check_unmap+0x848/0x9c0
LR [c0000000004f5ed4] .check_unmap+0x844/0x9c0
Call Trace:
[c0000000fffd38d0] [c0000000004f5ed4] .check_unmap+0x844/0x9c0 (unreliable)
[c0000000fffd3970] [c0000000004f60d4] .debug_dma_unmap_page+0x84/0xb0
[c0000000fffd3aa0] [c0000000008295cc] .ahash_done+0x1dc/0x360
[c0000000fffd3ca0] [c00000000081b7ec] .caam_jr_dequeue+0x26c/0x3a0
[c0000000fffd3da0] [c0000000008be50c] .net_rx_action+0x1cc/0x330
[c0000000fffd3e80] [c00000000007276c] .__do_softirq+0x19c/0x3d0
[c0000000fffd3f90] [c000000000017054] .call_do_softirq+0x14/0x24
[c0000000f775ef10] [c000000000005fe8] .do_softirq+0x118/0x150
sda: sda1 sda2 sda3
[c0000000f775efa0] [c000000000072c54] .irq_exit+0x124/0x140
[c0000000f775f020] [c000000000005ac4] .do_IRQ+0x184/0x370
[c0000000f775f0d0] [c00000000001b93c] exc_0x500_common+0xfc/0x100
--- Exception: 501 at .rcu_note_context_switch+0x0/0x370
edule+0xbc/0x7f0
[c0000000f775f3c0] [c000000000a29944] .__schedule+0xa4/0x7f0 (unreliable)
[c0000000f775f620] [c000000000a277f4] .schedule_timeout+0x1b4/0x2e0
[c0000000f775f700] [c000000000a29428] .wait_for_common+0xf8/0x1d0
[c0000000f775f7c0] [c000000000a295ac] .wait_for_completion_interruptible+0x2c/0x50
[c0000000f775f840] [c000000000494b64] .do_one_async_hash_op.isra.1.part.2+0x24/0x50
[c0000000f775f8c0] [c0000000004951a8] .test_hash+0x618/0x7d0
[c0000000f775fb30] [c000000000495424] .alg_test_hash+0xc4/0xf0
[c0000000f775fbc0] [c000000000494928] .alg_test+0xa8/0x2c0
[c0000000f775fcb0] [c000000000491164] .cryptomgr_test+0x64/0x80
[c0000000f775fd30] [c00000000009a8d0] .kthread+0xf0/0x100
[c0000000f775fe30] [c000000000000a08] .ret_from_kernel_thread+0x5c/0xd4
Instruction dump:
7c641b78 419e0160 e8a90050 2fa50000 409e0008 e8a90010 e8de0028 e8fe0030
3c62ff90 38638320 48546b69 60000000 <0fe00000> 4bffff34 e87e0010 2fa30000
---[ end trace 52825d316d569f00 ]---

Signed-off-by: Yanjiang Jin <yanjiang.jin@xxxxxxxxxxxxx>
---
drivers/crypto/caam/caamhash.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/crypto/caam/caamhash.c b/drivers/crypto/caam/caamhash.c
index f6ad322..a6ba9f7 100644
--- a/drivers/crypto/caam/caamhash.c
+++ b/drivers/crypto/caam/caamhash.c
@@ -451,7 +451,7 @@ static int hash_digest_key(struct caam_hash_ctx *ctx, const u8 *key_in,
dma_addr_t src_dma, dst_dma;
int ret = 0;

- desc = kmalloc(CAAM_CMD_SZ * 8 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
+ desc = kzalloc(CAAM_CMD_SZ * 8 + CAAM_PTR_SZ * 2, GFP_KERNEL | GFP_DMA);
if (!desc) {
dev_err(jrdev, "unable to allocate key input memory\n");
return -ENOMEM;
@@ -815,7 +815,7 @@ static int ahash_update_ctx(struct ahash_request *req)
* allocate space for base edesc and hw desc commands,
* link tables
*/
- edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+ edesc = kzalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
sec4_sg_bytes, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev,
@@ -926,7 +926,7 @@ static int ahash_final_ctx(struct ahash_request *req)
sec4_sg_bytes = (1 + (buflen ? 1 : 0)) * sizeof(struct sec4_sg_entry);

/* allocate space for base edesc and hw desc commands, link tables */
- edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+ edesc = kzalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
sec4_sg_bytes, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
@@ -1013,7 +1013,7 @@ static int ahash_finup_ctx(struct ahash_request *req)
sizeof(struct sec4_sg_entry);

/* allocate space for base edesc and hw desc commands, link tables */
- edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+ edesc = kzalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
sec4_sg_bytes, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
@@ -1099,7 +1099,7 @@ static int ahash_digest(struct ahash_request *req)
sec4_sg_bytes = src_nents * sizeof(struct sec4_sg_entry);

/* allocate space for base edesc and hw desc commands, link tables */
- edesc = kmalloc(sizeof(struct ahash_edesc) + sec4_sg_bytes +
+ edesc = kzalloc(sizeof(struct ahash_edesc) + sec4_sg_bytes +
DESC_JOB_IO_LEN, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
@@ -1173,7 +1173,7 @@ static int ahash_final_no_ctx(struct ahash_request *req)
int sh_len;

/* allocate space for base edesc and hw desc commands, link tables */
- edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN,
+ edesc = kzalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN,
GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
@@ -1252,7 +1252,7 @@ static int ahash_update_no_ctx(struct ahash_request *req)
* allocate space for base edesc and hw desc commands,
* link tables
*/
- edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+ edesc = kzalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
sec4_sg_bytes, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev,
@@ -1359,7 +1359,7 @@ static int ahash_finup_no_ctx(struct ahash_request *req)
sizeof(struct sec4_sg_entry);

/* allocate space for base edesc and hw desc commands, link tables */
- edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+ edesc = kzalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
sec4_sg_bytes, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev, "could not allocate extended descriptor\n");
@@ -1454,7 +1454,7 @@ static int ahash_update_first(struct ahash_request *req)
* allocate space for base edesc and hw desc commands,
* link tables
*/
- edesc = kmalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
+ edesc = kzalloc(sizeof(struct ahash_edesc) + DESC_JOB_IO_LEN +
sec4_sg_bytes, GFP_DMA | flags);
if (!edesc) {
dev_err(jrdev,
--
1.9.1

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