diff options
| author | Conor Dooley <conor.dooley@microchip.com> | 2023-03-07 23:22:51 +0300 |
|---|---|---|
| committer | Conor Dooley <conor.dooley@microchip.com> | 2023-04-03 21:25:31 +0300 |
| commit | 75dfbcbfd781f826c73ebe42b78d49c23179d082 (patch) | |
| tree | 2e1892adf9901d9dec28533217b4bffcf34a130c /drivers | |
| parent | fe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff) | |
| download | linux-75dfbcbfd781f826c73ebe42b78d49c23179d082.tar.xz | |
mailbox: mpfs: fix an incorrect mask width
The system controller registers on PolarFire SoC are 32 bits wide, so
16 + 16 as the first input to GENMASK_ULL() gives a 33 bit wide mask.
It probably should have been immediately obvious when it was pointed
out during review that the width required using GENMASK_ULL() - but I
scarcely knew what I was doing at the time and missed it.
The mistake ends up being moot as it is a mask after all, but it is
incorrect and should be fixed.
No functional change intended.
Acked-by: Jassi Brar <jaswinder.singh@linaro.org>
Tested-by: Valentina Fernandez <valentina.fernandezalanis@microchip.com>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/mailbox/mailbox-mpfs.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mailbox/mailbox-mpfs.c b/drivers/mailbox/mailbox-mpfs.c index 853901acaeec..d37560e91116 100644 --- a/drivers/mailbox/mailbox-mpfs.c +++ b/drivers/mailbox/mailbox-mpfs.c @@ -39,7 +39,7 @@ #define SCB_CTRL_NOTIFY_MASK BIT(SCB_CTRL_NOTIFY) #define SCB_CTRL_POS (16) -#define SCB_CTRL_MASK GENMASK_ULL(SCB_CTRL_POS + SCB_MASK_WIDTH, SCB_CTRL_POS) +#define SCB_CTRL_MASK GENMASK(SCB_CTRL_POS + SCB_MASK_WIDTH - 1, SCB_CTRL_POS) /* SCBCTRL service status register */ @@ -118,6 +118,7 @@ static int mpfs_mbox_send_data(struct mbox_chan *chan, void *data) } opt_sel = ((msg->mbox_offset << 7u) | (msg->cmd_opcode & 0x7fu)); + tx_trigger = (opt_sel << SCB_CTRL_POS) & SCB_CTRL_MASK; tx_trigger |= SCB_CTRL_REQ_MASK | SCB_STATUS_NOTIFY_MASK; writel_relaxed(tx_trigger, mbox->ctrl_base + SERVICES_CR_OFFSET); |