kernel/linux.git/drivers/staging/axis-fifo, branch v7.0.11

staging: axis-fifo: Fix indentation

2026-01-27T14:34:32+00:00

Check reported by checkpatch.pl CHECK: Alignment should match open parenthesis Signed-off-by: Geet Singhi Link: https://patch.msgid.link/20260123205905.37717-1-singhigeet1729@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Clean up register and mask definitions

2026-01-11T12:54:12+00:00

Improve readability and consistency of hardware register definitions: - Remove unnecessary leading zeros from register offset values - Use BIT() macro for single-bit interrupt mask definitions - Align values and comments for better readability No functional change. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-9-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Remove redundant comments

2026-01-11T12:54:12+00:00

Drop banner-style section header comments and also remove comments around self-explanatory code to reduce clutter and improve readability. No functional changes. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-8-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Remove noisy error messages for user errors

2026-01-11T12:54:12+00:00

Remove dev_err() calls for conditions caused by invalid userspace input. Logging them clutters the kernel log, especially if userspace repeatedly makes invalid calls. Also, consolidate the write validation checks into a single condition. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-7-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Remove unnecessary zero-length packet check

2026-01-11T12:54:12+00:00

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

staging: axis-fifo: Remove unnecessary casts from file->private_data

2026-01-11T12:54:12+00:00

Drop explicit casts when accessing file->private_data in the read() and write() paths, as they are not needed. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-5-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Drop unneeded release callback

2026-01-11T12:54:12+00:00

The release function only clears file->private_data, which is not needed. Remove the callback. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-4-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Use devm_kasprintf for device name allocation

2026-01-11T12:54:12+00:00

Replace manual kzalloc + snprintf with devm_kasprintf, which is cleaner and purpose-built for this use case. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-3-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Add poll() support

2026-01-11T12:54:11+00:00

Implement poll() file operation to allow userspace applications to wait for FIFO readiness using select()/poll()/epoll(). This replaces the module parameter-based timeouts removed in the previous commit. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-2-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Remove read/write timeout module parameters

2026-01-11T12:54:11+00:00

Module parameters for timeouts are a poor interface choice as they affect all device instances globally rather than being configurable per file descriptor. The current implementation also returns -EAGAIN on timeout, requiring userspace to implement retry loops around blocking operations. Remove the read_timeout and write_timeout module parameters. The next commit adds poll() support, allowing applications to implement timeout handling using standard poll()/select() interfaces. Signed-off-by: Ovidiu Panait Link: https://patch.msgid.link/20251227212640.3321310-1-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman