From: Conor Dooley conor.dooley@microchip.com

In commit 13529647743d9 ("spi: microchip-core-qspi: Support per spi-mem operation frequency switches") the logic for checking the viability of op->max_freq in mchp_coreqspi_setup_clock() was copied into mchp_coreqspi_supports_op(). Unfortunately, op->max_freq is not valid when this function is called during probe but is instead zero. Accordingly, baud_rate_val is calculated to be INT_MAX due to division by zero, causing probe of the attached memory device to fail.

Seemingly spi-microchip-core-qspi was the only driver that had such a modification made to its supports_op callback when the per_op_freq capability was added, so just remove it to restore prior functionality.

CC: stable@vger.kernel.org Reported-by: Valentina Fernandez valentina.fernandezalanis@microchip.com Fixes: 13529647743d9 ("spi: microchip-core-qspi: Support per spi-mem operation frequency switches") Signed-off-by: Conor Dooley conor.dooley@microchip.com --- CC: Conor Dooley conor.dooley@microchip.com CC: Daire McNamara daire.mcnamara@microchip.com CC: Mark Brown broonie@kernel.org CC: Miquel Raynal miquel.raynal@bootlin.com CC: linux-spi@vger.kernel.org CC: linux-kernel@vger.kernel.org --- drivers/spi/spi-microchip-core-qspi.c | 12 ------------ 1 file changed, 12 deletions(-)

diff --git a/drivers/spi/spi-microchip-core-qspi.c b/drivers/spi/spi-microchip-core-qspi.c index d13a9b755c7f8..8dc98b17f77b5 100644 --- a/drivers/spi/spi-microchip-core-qspi.c +++ b/drivers/spi/spi-microchip-core-qspi.c @@ -531,10 +531,6 @@ static int mchp_coreqspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *o

static bool mchp_coreqspi_supports_op(struct spi_mem *mem, const struct spi_mem_op *op) { - struct mchp_coreqspi *qspi = spi_controller_get_devdata(mem->spi->controller); - unsigned long clk_hz; - u32 baud_rate_val; - if (!spi_mem_default_supports_op(mem, op)) return false;

@@ -557,14 +553,6 @@ static bool mchp_coreqspi_supports_op(struct spi_mem *mem, const struct spi_mem_ return false; }

- clk_hz = clk_get_rate(qspi->clk); - if (!clk_hz) - return false; - - baud_rate_val = DIV_ROUND_UP(clk_hz, 2 * op->max_freq); - if (baud_rate_val > MAX_DIVIDER || baud_rate_val < MIN_DIVIDER) - return false; - return true; }