[PATCH v2 0/2] spi: axi-spi-engine: fix stale SYNC IRQ pending

[Jonathan Santos <Jonathan.Santos@analog.com>]

Both spi_engine_setup() and spi_engine_trigger_enable() send a SYNC(1)
command and poll SYNC_ID, but never clear INT_PENDING[SYNC] afterward.
This leaves a stale pending bit that fires spuriously when INT_SYNC is
enabled later by some driver, causing premature transfer completion at
low SPI clock frequencies (more likely). Fix both functions by clearing
the pending bit after polling.

v2 summary:
* Replaced "Link" tag for "Closes" tag.
* Included "Fixes" tag.
* Added new patch applying similar fix for the spi_engine_trigger_enable(),
  as pointed out by David.
* While at it, replaced plain "1000" by "1 * USEC_PER_MSEC" for better
  clarity.
* Link to v1: https://lore.kernel.org/linux-spi/04d51e99b8cddce51113db933d806e83848f04f5.1788313558.git.Jonathan.Santos@analog.com/T/#t

Jonathan Santos (2):
  spi: axi-spi-engine: fix stale SYNC IRQ pending
  spi: axi-spi-engine: fix stale SYNC IRQ pending in trigger_enable

 drivers/spi/spi-axi-spi-engine.c | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)


base-commit: a3b3580713f3ac5a32dc2874ee546828977a1d68
-- 
2.34.1