A mailbox command contains 1-DWORD header + arguments. The "len" variable only contains the length of the arguments, but not the 1-DWORD header. Include the length of header when checking the ring buffer space to prevent off-by-one error.
Signed-off-by: Ley Foon Tan <[email protected]> Signed-off-by: Chee Hong Ang <[email protected]> --- v2->v3: - Update commit description. --- arch/arm/mach-socfpga/mailbox_s10.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/mach-socfpga/mailbox_s10.c b/arch/arm/mach-socfpga/mailbox_s10.c index 3c33223936..8363c93e90 100644 --- a/arch/arm/mach-socfpga/mailbox_s10.c +++ b/arch/arm/mach-socfpga/mailbox_s10.c @@ -59,7 +59,7 @@ static __always_inline int mbox_fill_cmd_circular_buff(u32 header, u32 len, */ if (((cin + 1) % MBOX_CMD_BUFFER_SIZE) == cout || ((MBOX_CMD_BUFFER_SIZE - cin + cout - 1) % - MBOX_CMD_BUFFER_SIZE) < len) + MBOX_CMD_BUFFER_SIZE) < (len + 1)) return -ENOMEM; /* write header to circular buffer */ -- 2.19.0 _______________________________________________ U-Boot mailing list [email protected] https://lists.denx.de/listinfo/u-boot
