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Date: Fri, 14 Oct 2016 13:44:02 +0200
From: SF Markus Elfring <elfring@...rs.sourceforge.net>
To: linux-media@...r.kernel.org,
David Härdeman <david@...deman.nu>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Sean Young <sean@...s.org>
Cc: LKML <linux-kernel@...r.kernel.org>,
kernel-janitors@...r.kernel.org,
Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH 4/5] [media] winbond-cir: One variable and its check less in
wbcir_shutdown() after error detection
From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 14 Oct 2016 12:48:41 +0200
The local variable "do_wake" was set to "false" after an invalid system
setting was detected so that a bit of error handling was triggered.
* Replace these assignments by direct jumps to the source code with the
desired exception handling.
* Delete this status variable and a corresponding check which became
unnecessary with this refactoring.
Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
drivers/media/rc/winbond-cir.c | 78 ++++++++++++++++++------------------------
1 file changed, 34 insertions(+), 44 deletions(-)
diff --git a/drivers/media/rc/winbond-cir.c b/drivers/media/rc/winbond-cir.c
index 9d05e17..3d286b9 100644
--- a/drivers/media/rc/winbond-cir.c
+++ b/drivers/media/rc/winbond-cir.c
@@ -699,16 +699,13 @@ wbcir_shutdown(struct pnp_dev *device)
{
struct device *dev = &device->dev;
struct wbcir_data *data = pnp_get_drvdata(device);
- bool do_wake = true;
u8 match[11];
u8 mask[11];
u8 rc6_csl;
int i;
- if (wake_sc == INVALID_SCANCODE || !device_may_wakeup(dev)) {
- do_wake = false;
- goto finish;
- }
+ if (wake_sc == INVALID_SCANCODE || !device_may_wakeup(dev))
+ goto clear_bits;
rc6_csl = 0;
memset(match, 0, sizeof(match));
@@ -716,9 +713,8 @@ wbcir_shutdown(struct pnp_dev *device)
switch (protocol) {
case IR_PROTOCOL_RC5:
if (wake_sc > 0xFFF) {
- do_wake = false;
dev_err(dev, "RC5 - Invalid wake scancode\n");
- break;
+ goto clear_bits;
}
/* Mask = 13 bits, ex toggle */
@@ -735,9 +731,8 @@ wbcir_shutdown(struct pnp_dev *device)
case IR_PROTOCOL_NEC:
if (wake_sc > 0xFFFFFF) {
- do_wake = false;
dev_err(dev, "NEC - Invalid wake scancode\n");
- break;
+ goto clear_bits;
}
mask[0] = mask[1] = mask[2] = mask[3] = 0xFF;
@@ -757,9 +752,8 @@ wbcir_shutdown(struct pnp_dev *device)
if (wake_rc6mode == 0) {
if (wake_sc > 0xFFFF) {
- do_wake = false;
dev_err(dev, "RC6 - Invalid wake scancode\n");
- break;
+ goto clear_bits;
}
/* Command */
@@ -813,9 +807,8 @@ wbcir_shutdown(struct pnp_dev *device)
} else if (wake_sc <= 0x007FFFFF) {
rc6_csl = 60;
} else {
- do_wake = false;
dev_err(dev, "RC6 - Invalid wake scancode\n");
- break;
+ goto clear_bits;
}
/* Header */
@@ -825,49 +818,38 @@ wbcir_shutdown(struct pnp_dev *device)
mask[i++] = 0x0F;
} else {
- do_wake = false;
dev_err(dev, "RC6 - Invalid wake mode\n");
+ goto clear_bits;
}
break;
default:
- do_wake = false;
- break;
+ goto clear_bits;
}
-finish:
- if (do_wake) {
- /* Set compare and compare mask */
- wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
- WBCIR_REGSEL_COMPARE | WBCIR_REG_ADDR0,
- 0x3F);
- outsb(data->wbase + WBCIR_REG_WCEIR_DATA, match, 11);
- wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
- WBCIR_REGSEL_MASK | WBCIR_REG_ADDR0,
- 0x3F);
- outsb(data->wbase + WBCIR_REG_WCEIR_DATA, mask, 11);
-
- /* RC6 Compare String Len */
- outb(rc6_csl, data->wbase + WBCIR_REG_WCEIR_CSL);
-
- /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
- wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
+ /* Set compare and compare mask */
+ wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
+ WBCIR_REGSEL_COMPARE | WBCIR_REG_ADDR0,
+ 0x3F);
+ outsb(data->wbase + WBCIR_REG_WCEIR_DATA, match, 11);
+ wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_INDEX,
+ WBCIR_REGSEL_MASK | WBCIR_REG_ADDR0,
+ 0x3F);
+ outsb(data->wbase + WBCIR_REG_WCEIR_DATA, mask, 11);
- /* Clear BUFF_EN, Clear END_EN, Set MATCH_EN */
- wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x01, 0x07);
+ /* RC6 Compare String Len */
+ outb(rc6_csl, data->wbase + WBCIR_REG_WCEIR_CSL);
- /* Set CEIR_EN */
- wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x01, 0x01);
-
- } else {
- /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
- wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
+ /* Clear status bits NEC_REP, BUFF, MSG_END, MATCH */
+ wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_STS, 0x17, 0x17);
- /* Clear CEIR_EN */
- wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
- }
+ /* Clear BUFF_EN, Clear END_EN, Set MATCH_EN */
+ wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x01, 0x07);
+ /* Set CEIR_EN */
+ wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x01, 0x01);
+set_irqmask:
/*
* ACPI will set the HW disable bit for SP3 which means that the
* output signals are left in an undefined state which may cause
@@ -876,6 +858,14 @@ wbcir_shutdown(struct pnp_dev *device)
*/
wbcir_set_irqmask(data, WBCIR_IRQ_NONE);
disable_irq(data->irq);
+ return;
+clear_bits:
+ /* Clear BUFF_EN, Clear END_EN, Clear MATCH_EN */
+ wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_EV_EN, 0x00, 0x07);
+
+ /* Clear CEIR_EN */
+ wbcir_set_bits(data->wbase + WBCIR_REG_WCEIR_CTL, 0x00, 0x01);
+ goto set_irqmask;
}
static int
--
2.10.1
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