linux/drivers/staging/axis-fifo, branch master

staging: axis-fifo: refactor device tree parsing

2026-02-23T14:45:31Z

Refactor the device tree parsing logic in axis_fifo_probe() to reduce verbosity and simplify error handling. Remove the verbose error logging and goto logic. Instead, check of_property_read_u32() return values directly and propagate error codes immediately. This aligns the driver with modern kernel standards by removing unnecessary error messages during probe. Signed-off-by: Gustavo Piaz da Silva Reviewed-by: Dan Carpenter Link: https://patch.msgid.link/20260223114207.3639-3-gustavopiazdasilva2102@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: use u32 for fifo depth flags

2026-02-23T14:45:31Z

Update has_rx_fifo and has_tx_fifo types from int to u32 in struct axis_fifo. The of_property_read_u32() function expects a pointer to u32. Although the current code works correctly with int, using u32 aligns the data structure with the Device Tree API and prevents potential type-mismatch issues. Signed-off-by: Gustavo Piaz da Silva Reviewed-by: Dan Carpenter Link: https://patch.msgid.link/20260223114207.3639-2-gustavopiazdasilva2102@gmail.com Signed-off-by: Greg Kroah-Hartman

staging: axis-fifo: Fix indentation

2026-01-27T14:34:32Z

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

2026-01-11T12:54:12Z

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

2026-01-11T12:54:12Z

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

2026-01-11T12:54:12Z

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

2026-01-11T12:54:12Z

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

2026-01-11T12:54:12Z

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

2026-01-11T12:54:12Z

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

2026-01-11T12:54:12Z

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