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[2/4] spi: airoha: fix airoha_snand_{write,read}_data data_len estimation

Message ID 20240913-airoha-spi-fixes-v1-2-de2e74ed4664@kernel.org
State Accepted
Commit 0e58637eb968c636725dcd6c7055249b4e5326fb
Headers show
Series spi: airoha: Fix errors reported by mtd_test kernel modules | expand

Commit Message

Lorenzo Bianconi Sept. 13, 2024, 9:07 p.m. UTC 
Fix data length written and read in airoha_snand_write_data and
airoha_snand_read_data routines respectively if it is bigger than
SPI_MAX_TRANSFER_SIZE.

Fixes: a403997c1201 ("spi: airoha: add SPI-NAND Flash controller driver")
Tested-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
---
 drivers/spi/spi-airoha-snfi.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/spi/spi-airoha-snfi.c b/drivers/spi/spi-airoha-snfi.c
index be3e4ac42153..c71be702cf6f 100644
--- a/drivers/spi/spi-airoha-snfi.c
+++ b/drivers/spi/spi-airoha-snfi.c
@@ -405,7 +405,7 @@  static int airoha_snand_write_data(struct airoha_snand_ctrl *as_ctrl, u8 cmd,
 	for (i = 0; i < len; i += data_len) {
 		int err;
 
-		data_len = min(len, SPI_MAX_TRANSFER_SIZE);
+		data_len = min(len - i, SPI_MAX_TRANSFER_SIZE);
 		err = airoha_snand_set_fifo_op(as_ctrl, cmd, data_len);
 		if (err)
 			return err;
@@ -427,7 +427,7 @@  static int airoha_snand_read_data(struct airoha_snand_ctrl *as_ctrl, u8 *data,
 	for (i = 0; i < len; i += data_len) {
 		int err;
 
-		data_len = min(len, SPI_MAX_TRANSFER_SIZE);
+		data_len = min(len - i, SPI_MAX_TRANSFER_SIZE);
 		err = airoha_snand_set_fifo_op(as_ctrl, 0xc, data_len);
 		if (err)
 			return err;