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mmc: test: reduce stack usage in mmc_test_nonblock_transfer

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The new lockdep annotations for completions cause a warning in the
mmc test module, in a function that now has four 150 byte structures
on the stack:

drivers/mmc/core/mmc_test.c: In function 'mmc_test_nonblock_transfer.constprop':
drivers/mmc/core/mmc_test.c:892:1: error: the frame size of 1360 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

The mmc_test_ongoing_transfer function evidently had a similar problem,
and worked around it by using dynamic allocation.

This generalizes the approach used by mmc_test_ongoing_transfer() and
applies it to mmc_test_nonblock_transfer() as well.

Fixes: cd8084f91c ("locking/lockdep: Apply crossrelease to completions")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Arnd Bergmann 2017-08-15 17:11:58 +02:00 committed by Ulf Hansson
parent 2f3110cc89
commit 098dc66ade
1 changed files with 41 additions and 56 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

97
drivers/mmc/core/mmc_test.c
View file

@ -800,38 +800,44 @@ static int mmc_test_check_broken_result(struct mmc_test_card *test,
return ret;
}
struct mmc_test_req {
struct mmc_request mrq;
struct mmc_command sbc;
struct mmc_command cmd;
struct mmc_command stop;
struct mmc_command status;
struct mmc_data data;
};
/*
* Tests nonblock transfer with certain parameters
*/
static void mmc_test_nonblock_reset(struct mmc_request *mrq,
struct mmc_command *cmd,
struct mmc_command *stop,
struct mmc_data *data)
static void mmc_test_req_reset(struct mmc_test_req *rq)
{
memset(mrq, 0, sizeof(struct mmc_request));
memset(cmd, 0, sizeof(struct mmc_command));
memset(data, 0, sizeof(struct mmc_data));
memset(stop, 0, sizeof(struct mmc_command));
memset(rq, 0, sizeof(struct mmc_test_req));
mrq->cmd = cmd;
mrq->data = data;
mrq->stop = stop;
rq->mrq.cmd = &rq->cmd;
rq->mrq.data = &rq->data;
rq->mrq.stop = &rq->stop;
}
static struct mmc_test_req *mmc_test_req_alloc(void)
{
struct mmc_test_req *rq = kmalloc(sizeof(*rq), GFP_KERNEL);
if (rq)
mmc_test_req_reset(rq);
return rq;
}
static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
struct scatterlist *sg, unsigned sg_len,
unsigned dev_addr, unsigned blocks,
unsigned blksz, int write, int count)
{
struct mmc_request mrq1;
struct mmc_command cmd1;
struct mmc_command stop1;
struct mmc_data data1;
struct mmc_request mrq2;
struct mmc_command cmd2;
struct mmc_command stop2;
struct mmc_data data2;
struct mmc_test_req *rq1, *rq2;
struct mmc_test_async_req test_areq[2];
struct mmc_async_req *done_areq;
struct mmc_async_req *cur_areq = &test_areq[0].areq;
@ -843,12 +849,16 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
test_areq[0].test = test;
test_areq[1].test = test;
mmc_test_nonblock_reset(&mrq1, &cmd1, &stop1, &data1);
mmc_test_nonblock_reset(&mrq2, &cmd2, &stop2, &data2);
rq1 = mmc_test_req_alloc();
rq2 = mmc_test_req_alloc();
if (!rq1 || !rq2) {
ret = RESULT_FAIL;
goto err;
}
cur_areq->mrq = &mrq1;
cur_areq->mrq = &rq1->mrq;
cur_areq->err_check = mmc_test_check_result_async;
other_areq->mrq = &mrq2;
other_areq->mrq = &rq2->mrq;
other_areq->err_check = mmc_test_check_result_async;
for (i = 0; i < count; i++) {
@ -861,14 +871,10 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
goto err;
}
if (done_areq) {
if (done_areq->mrq == &mrq2)
mmc_test_nonblock_reset(&mrq2, &cmd2,
&stop2, &data2);
else
mmc_test_nonblock_reset(&mrq1, &cmd1,
&stop1, &data1);
}
if (done_areq)
mmc_test_req_reset(container_of(done_areq->mrq,
struct mmc_test_req, mrq));
swap(cur_areq, other_areq);
dev_addr += blocks;
}
@ -877,8 +883,9 @@ static int mmc_test_nonblock_transfer(struct mmc_test_card *test,
if (status != MMC_BLK_SUCCESS)
ret = RESULT_FAIL;
return ret;
err:
kfree(rq1);
kfree(rq2);
return ret;
}
@ -2329,28 +2336,6 @@ static int mmc_test_reset(struct mmc_test_card *test)
return RESULT_FAIL;
}
struct mmc_test_req {
struct mmc_request mrq;
struct mmc_command sbc;
struct mmc_command cmd;
struct mmc_command stop;
struct mmc_command status;
struct mmc_data data;
};
static struct mmc_test_req *mmc_test_req_alloc(void)
{
struct mmc_test_req *rq = kzalloc(sizeof(*rq), GFP_KERNEL);
if (rq) {
rq->mrq.cmd = &rq->cmd;
rq->mrq.data = &rq->data;
rq->mrq.stop = &rq->stop;
}
return rq;
}
static int mmc_test_send_status(struct mmc_test_card *test,
struct mmc_command *cmd)
{