Re: [PATCH 6.1.y] spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer

HIiall,

Why isn't this patch being applied? If you have forgotten, could you please apply this?

Best regards, Nobuhiro

2025年5月13日(火) 6:52 Sasha Levin sashal@kernel.org:

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected. No action required from the submitter.

The upstream commit SHA1 provided is correct: 9cf71eb0faef4bff01df4264841b8465382d7927

WARNING: Author mismatch between patch and upstream commit: Backport author: jianqi.ren.cn@windriver.com Commit author: Steve Wilkinssteve.wilkins@raymarine.com

Status in newer kernel trees: 6.14.y | Present (exact SHA1) 6.12.y | Present (exact SHA1) 6.6.y | Present (different SHA1: 3feda3677e8b)

Note: The patch differs from the upstream commit:

1: 9cf71eb0faef4 ! 1: e2b7a4dc57e1d spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer @@ Metadata ## Commit message ## spi: microchip-core: ensure TX and RX FIFOs are empty at start of a transfer

+    [ Upstream commit 9cf71eb0faef4bff01df4264841b8465382d7927 ]
+
     While transmitting with rx_len == 0, the RX FIFO is not going to be
     emptied in the interrupt handler. A subsequent transfer could then
     read crap from the previous transfer out of the RX FIFO into the
@@ Commit message
     Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
     Link: https://patch.msgid.link/20240715-flammable-provoke-459226d08e70@wendy
     Signed-off-by: Mark Brown <broonie@kernel.org>
+    [Minor conflict resolved due to code context change.]
+    Signed-off-by: Jianqi Ren <jianqi.ren.cn@windriver.com>
+    Signed-off-by: He Zhe <zhe.he@windriver.com>

  ## drivers/spi/spi-microchip-core.c ##
 @@
@@ drivers/spi/spi-microchip-core.c: static int mchp_corespi_transfer_one(struct sp

 +  mchp_corespi_write(spi, REG_COMMAND, COMMAND_RXFIFORST | COMMAND_TXFIFORST);
 +
-   mchp_corespi_write(spi, REG_SLAVE_SELECT, spi->pending_slave_select);
-
    while (spi->tx_len)
+           mchp_corespi_write_fifo(spi);
+

---

Results of testing on various branches:

| Branch | Patch Apply | Build Test | |---------------------------|-------------|------------| | stable/linux-6.1.y | Success | Success |