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misc: fastrpc: Allow fastrpc_buf_free() to accept NULL

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Make fastrpc_buf_free() a no-op when passed a NULL pointer, allowing
callers to avoid open-coded NULL checks.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Signed-off-by: Ekansh Gupta <ekansh.gupta@oss.qualcomm.com>
Signed-off-by: Jianping Li <jianping.li@oss.qualcomm.com>
Signed-off-by: Srinivas Kandagatla <srini@kernel.org>
Link: https://patch.msgid.link/20260729094352.111065-3-srini@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ekansh Gupta
2026-07-29 10:43:44 +01:00
committed by Greg Kroah-Hartman
parent c3306dd3bd
commit 23fce99d05
1 changed files with 5 additions and 4 deletions
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9
drivers/misc/fastrpc.c
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@@ -422,6 +422,9 @@ static int fastrpc_map_lookup(struct fastrpc_user *fl, int fd,
static void fastrpc_buf_free(struct fastrpc_buf *buf)
{
if (!buf)
return;
dma_free_coherent(buf->dev, buf->size, buf->virt,
fastrpc_ipa_to_dma_addr(buf->fl->cctx, buf->dma_addr));
kfree(buf);
@@ -514,8 +517,7 @@ static void fastrpc_user_free(struct kref *ref)
struct fastrpc_map *map, *m;
struct fastrpc_buf *buf, *b;
if (fl->init_mem)
fastrpc_buf_free(fl->init_mem);
fastrpc_buf_free(fl->init_mem);
list_for_each_entry_safe(ctx, n, &fl->pending, node) {
list_del(&ctx->node);
@@ -560,8 +562,7 @@ static void fastrpc_context_free(struct kref *ref)
for (i = 0; i < ctx->nbufs; i++)
fastrpc_map_put(ctx->maps[i]);
if (ctx->buf)
fastrpc_buf_free(ctx->buf);
fastrpc_buf_free(ctx->buf);
spin_lock_irqsave(&cctx->lock, flags);
idr_remove(&cctx->ctx_idr, ctx->ctxid >> 4);