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authorConor Dooley <conor.dooley@microchip.com>2023-03-07 23:22:51 +0300
committerConor Dooley <conor.dooley@microchip.com>2023-04-03 21:25:31 +0300
commit75dfbcbfd781f826c73ebe42b78d49c23179d082 (patch)
tree2e1892adf9901d9dec28533217b4bffcf34a130c /drivers/mailbox/mailbox-mpfs.c
parentfe15c26ee26efa11741a7b632e9f23b01aca4cc6 (diff)
downloadlinux-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/mailbox/mailbox-mpfs.c')
-rw-r--r--drivers/mailbox/mailbox-mpfs.c3
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);