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soc: fsl: dpio: avoid stack usage warning

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A 1024 byte variable on the stack will warn on any 32-bit architecture
during compile-testing, and is generally a bad idea anyway:

fsl/dpio/dpio-service.c: In function 'dpaa2_io_service_enqueue_multiple_desc_fq':
fsl/dpio/dpio-service.c:495:1: error: the frame size of 1032 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]

There are currently no callers of this function, so I cannot tell whether
dynamic memory allocation is allowed once callers are added. Change
it to kcalloc for now, if anyone gets a warning about calling this in
atomic context after they start using it, they can fix it later.

Link: https://lore.kernel.org/r/20200408185834.434784-1-arnd@arndb.de
Fixes: 9d98809711 ("soc: fsl: dpio: Adding QMAN multiple enqueue interface")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2020-04-08 20:58:16 +02:00
parent 0666e3c481
commit 5c4a5999b2
1 changed files with 14 additions and 5 deletions
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19
drivers/soc/fsl/dpio/dpio-service.c
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@ -478,12 +478,18 @@ int dpaa2_io_service_enqueue_multiple_desc_fq(struct dpaa2_io *d,
const struct dpaa2_fd *fd, const struct dpaa2_fd *fd,
int nb) int nb)
{ {
int i; struct qbman_eq_desc *ed;
struct qbman_eq_desc ed[32]; int i, ret;
ed = kcalloc(sizeof(struct qbman_eq_desc), 32, GFP_KERNEL);
if (!ed)
return -ENOMEM;
d = service_select(d); d = service_select(d);
if (!d) if (!d) {
return -ENODEV; ret = -ENODEV;
goto out;
}
for (i = 0; i < nb; i++) { for (i = 0; i < nb; i++) {
qbman_eq_desc_clear(&ed[i]); qbman_eq_desc_clear(&ed[i]);
@ -491,7 +497,10 @@ int dpaa2_io_service_enqueue_multiple_desc_fq(struct dpaa2_io *d,
qbman_eq_desc_set_fq(&ed[i], fqid[i]); qbman_eq_desc_set_fq(&ed[i], fqid[i]);
} }
return qbman_swp_enqueue_multiple_desc(d->swp, &ed[0], fd, nb); ret = qbman_swp_enqueue_multiple_desc(d->swp, &ed[0], fd, nb);
out:
kfree(ed);
return ret;
} }
EXPORT_SYMBOL(dpaa2_io_service_enqueue_multiple_desc_fq); EXPORT_SYMBOL(dpaa2_io_service_enqueue_multiple_desc_fq);