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this commit break the ks7010 driver.

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for more information please read
 "SDIO single IRQ optimization breaks libertas" linux-mmc mailing list

 we should fix this in ks7010 driver. commit this revert first. fix later
This commit is contained in:
Xiangfu Liu 2011-11-17 15:08:48 +08:00
parent 90f7279151
commit 8fa1337cb9
1 changed files with 98 additions and 0 deletions
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98
target/linux/xburst/patches-3.0/0034-Revert-mmc-sdio-optimized-SDIO-IRQ-handling-for-sing.patch Normal file
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@ -0,0 +1,98 @@
From 81734e6cd3cd75be1608717e9cd0a6cac54af528 Mon Sep 17 00:00:00 2001
From: Xiangfu Liu <xiangfu@sharism.cc>
Date: Thu, 17 Nov 2011 14:41:20 +0800
Subject: [PATCH] Revert "mmc: sdio: optimized SDIO IRQ handling for single irq"
This reverts commit 06e8935febe687e2a561707d4c7ca4245d261dbe.
---
drivers/mmc/core/sdio_irq.c | 33 +--------------------------------
include/linux/mmc/card.h | 1 -
2 files changed, 1 insertions(+), 33 deletions(-)
diff --git a/drivers/mmc/core/sdio_irq.c b/drivers/mmc/core/sdio_irq.c
index 03ead02..b300161 100644
--- a/drivers/mmc/core/sdio_irq.c
+++ b/drivers/mmc/core/sdio_irq.c
@@ -31,17 +31,6 @@ static int process_sdio_pending_irqs(struct mmc_card *card)
{
int i, ret, count;
unsigned char pending;
- struct sdio_func *func;
-
- /*
- * Optimization, if there is only 1 function interrupt registered
- * call irq handler directly
- */
- func = card->sdio_single_irq;
- if (func) {
- func->irq_handler(func);
- return 1;
- }
ret = mmc_io_rw_direct(card, 0, 0, SDIO_CCCR_INTx, 0, &pending);
if (ret) {
@@ -53,7 +42,7 @@ static int process_sdio_pending_irqs(struct mmc_card *card)
count = 0;
for (i = 1; i <= 7; i++) {
if (pending & (1 << i)) {
- func = card->sdio_func[i - 1];
+ struct sdio_func *func = card->sdio_func[i - 1];
if (!func) {
printk(KERN_WARNING "%s: pending IRQ for "
"non-existent function\n",
@@ -197,24 +186,6 @@ static int sdio_card_irq_put(struct mmc_card *card)
return 0;
}
-/* If there is only 1 function registered set sdio_single_irq */
-static void sdio_single_irq_set(struct mmc_card *card)
-{
- struct sdio_func *func;
- int i;
-
- card->sdio_single_irq = NULL;
- if ((card->host->caps & MMC_CAP_SDIO_IRQ) &&
- card->host->sdio_irqs == 1)
- for (i = 0; i < card->sdio_funcs; i++) {
- func = card->sdio_func[i];
- if (func && func->irq_handler) {
- card->sdio_single_irq = func;
- break;
- }
- }
-}
-
/**
* sdio_claim_irq - claim the IRQ for a SDIO function
* @func: SDIO function
@@ -256,7 +227,6 @@ int sdio_claim_irq(struct sdio_func *func, sdio_irq_handler_t *handler)
ret = sdio_card_irq_get(func->card);
if (ret)
func->irq_handler = NULL;
- sdio_single_irq_set(func->card);
return ret;
}
@@ -281,7 +251,6 @@ int sdio_release_irq(struct sdio_func *func)
if (func->irq_handler) {
func->irq_handler = NULL;
sdio_card_irq_put(func->card);
- sdio_single_irq_set(func->card);
}
ret = mmc_io_rw_direct(func->card, 0, 0, SDIO_CCCR_IENx, 0, &reg);
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index 6ad4355..5fa4f05 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -208,7 +208,6 @@ struct mmc_card {
struct sdio_cccr cccr; /* common card info */
struct sdio_cis cis; /* common tuple info */
struct sdio_func *sdio_func[SDIO_MAX_FUNCS]; /* SDIO functions (devices) */
- struct sdio_func *sdio_single_irq; /* SDIO function when only one IRQ active */
unsigned num_info; /* number of info strings */
const char **info; /* info strings */
struct sdio_func_tuple *tuples; /* unknown common tuples */
--
1.7.4.1