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path: root/drivers/mailbox/pcc.c
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Diffstat (limited to 'drivers/mailbox/pcc.c')
-rw-r--r--drivers/mailbox/pcc.c24
1 files changed, 4 insertions, 20 deletions
diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index ed635f7d3f60..4bace1fa48f0 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -110,10 +110,8 @@ static struct mbox_controller pcc_mbox_ctrl = {};
* The below read_register and write_registers are used to read and
* write from perf critical registers such as PCC doorbell register
*/
-static int read_register(void __iomem *vaddr, u64 *val, unsigned int bit_width)
+static void read_register(void __iomem *vaddr, u64 *val, unsigned int bit_width)
{
- int ret_val = 0;
-
switch (bit_width) {
case 8:
*val = readb(vaddr);
@@ -127,19 +125,11 @@ static int read_register(void __iomem *vaddr, u64 *val, unsigned int bit_width)
case 64:
*val = readq(vaddr);
break;
- default:
- pr_debug("Error: Cannot read register of %u bit width",
- bit_width);
- ret_val = -EFAULT;
- break;
}
- return ret_val;
}
-static int write_register(void __iomem *vaddr, u64 val, unsigned int bit_width)
+static void write_register(void __iomem *vaddr, u64 val, unsigned int bit_width)
{
- int ret_val = 0;
-
switch (bit_width) {
case 8:
writeb(val, vaddr);
@@ -153,13 +143,7 @@ static int write_register(void __iomem *vaddr, u64 val, unsigned int bit_width)
case 64:
writeq(val, vaddr);
break;
- default:
- pr_debug("Error: Cannot write register of %u bit width",
- bit_width);
- ret_val = -EFAULT;
- break;
}
- return ret_val;
}
static int pcc_chan_reg_read(struct pcc_chan_reg *reg, u64 *val)
@@ -172,7 +156,7 @@ static int pcc_chan_reg_read(struct pcc_chan_reg *reg, u64 *val)
}
if (reg->vaddr)
- ret = read_register(reg->vaddr, val, reg->gas->bit_width);
+ read_register(reg->vaddr, val, reg->gas->bit_width);
else
ret = acpi_read(val, reg->gas);
@@ -187,7 +171,7 @@ static int pcc_chan_reg_write(struct pcc_chan_reg *reg, u64 val)
return 0;
if (reg->vaddr)
- ret = write_register(reg->vaddr, val, reg->gas->bit_width);
+ write_register(reg->vaddr, val, reg->gas->bit_width);
else
ret = acpi_write(val, reg->gas);