From ab517a047b4ef6b62e4ddabfdd3549f19e4bc4c9 Mon Sep 17 00:00:00 2001 From: Ovidiu Panait Date: Sat, 27 Dec 2025 23:26:37 +0200 Subject: [PATCH] staging: axis-fifo: Remove unnecessary zero-length packet check Remove the check for zero-length packets as this condition cannot occur during normal operation. According to the Xilinx AXI4-Stream FIFO Product Guide (PG080), in the Receive Length Register (RLR) description: "The smallest packet that can be received is 1 byte." A zero-length packet would indicate a bug in the IP core itself. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-6-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman --- drivers/staging/axis-fifo/axis-fifo.c | 5 ----- 1 file changed, 5 deletions(-) diff --git a/drivers/staging/axis-fifo/axis-fifo.c b/drivers/staging/axis-fifo/axis-fifo.c index bf610e71253e..6d9ff6384168 100644 --- a/drivers/staging/axis-fifo/axis-fifo.c +++ b/drivers/staging/axis-fifo/axis-fifo.c @@ -193,11 +193,6 @@ static ssize_t axis_fifo_read(struct file *f, char __user *buf, bytes_available = ioread32(fifo->base_addr + XLLF_RLR_OFFSET); words_available = bytes_available / sizeof(u32); - if (!bytes_available) { - dev_err(fifo->dt_device, "received a packet of length 0\n"); - ret = -EIO; - goto end_unlock; - } if (bytes_available > len) { dev_err(fifo->dt_device, "user read buffer too small (available bytes=%zu user buffer bytes=%zu)\n", -- 2.47.3