diff options
| -rw-r--r-- | arch/arm/mach-socfpga/mailbox_s10.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/mach-socfpga/mailbox_s10.c b/arch/arm/mach-socfpga/mailbox_s10.c index 3c33223936..4498ab55df 100644 --- a/arch/arm/mach-socfpga/mailbox_s10.c +++ b/arch/arm/mach-socfpga/mailbox_s10.c @@ -55,11 +55,11 @@ static __always_inline int mbox_fill_cmd_circular_buff(u32 header, u32 len, cout = MBOX_READL(MBOX_COUT) % MBOX_CMD_BUFFER_SIZE; /* if command buffer is full or not enough free space - * to fit the data + * to fit the data. Note, len is in u32 unit. */ 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 */ |