From: Julia Lawall <julia@xxxxxxx>
Allow the function to return 0 when 0 elements are asked for rather than
crashing the kernel with BUG.
Signed-off-by: Julia Lawall <julia@xxxxxxx>
Acked-by: Stefano Seibold <stefani@xxxxxxxxxxx>
---
var/julia/linuxcopy/kernel/kfifo.c | 6 ------
1 file changed, 6 deletions(-)
diff -u -p a/kernel/kfifo.c b/kernel/kfifo.c
index 01a0700..9f928ef 100644
--- a/var/linuxes/linux-next/kernel/kfifo.c
+++ b/var/julia/linuxcopy/kernel/kfifo.c
@@ -562,9 +562,6 @@ EXPORT_SYMBOL(__kfifo_to_user_r);
unsigned int __kfifo_dma_in_prepare_r(struct __kfifo *fifo,
struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
{
- if (!nents)
- BUG();
-
len = __kfifo_max_r(len, recsize);
if (len + recsize > kfifo_unused(fifo))
@@ -586,9 +583,6 @@ EXPORT_SYMBOL(__kfifo_dma_in_finish_r);
unsigned int __kfifo_dma_out_prepare_r(struct __kfifo *fifo,
struct scatterlist *sgl, int nents, unsigned int len, size_t recsize)
{
- if (!nents)
- BUG();
-
len = __kfifo_max_r(len, recsize);
if (len + recsize > fifo->in - fifo->out)
--
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