linux-kernel - [PATCH 10/11] memstick: try harder to recover from unsuccessful interface mode switch

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Message-Id: <1204646548-27466-11-git-send-email-oakad@exemail.com.au>
Date:	Wed,  5 Mar 2008 03:02:27 +1100
From:	oakad@...mail.com.au
To:	linux-kernel@...r.kernel.org
Cc:	akpm@...ux-foundation.org, Alex Dubov <oakad@...oo.com>
Subject: [PATCH 10/11] memstick: try harder to recover from unsuccessful interface mode switch

From: Alex Dubov <oakad@...oo.com>

Signed-off-by: Alex Dubov <oakad@...oo.com>
---
 drivers/memstick/core/mspro_block.c |   21 +++++++++++++++++++--
 1 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/drivers/memstick/core/mspro_block.c b/drivers/memstick/core/mspro_block.c
index 62b913b..1d637e4 100644
--- a/drivers/memstick/core/mspro_block.c
+++ b/drivers/memstick/core/mspro_block.c
@@ -16,6 +16,7 @@
 #include <linux/idr.h>
 #include <linux/hdreg.h>
 #include <linux/kthread.h>
+#include <linux/delay.h>
 #include <linux/memstick.h>
 
 #define DRIVER_NAME "mspro_block"
@@ -820,7 +821,7 @@ static int mspro_block_switch_to_parallel(struct memstick_dev *card)
 	struct memstick_host *host = card->host;
 	struct mspro_block_data *msb = memstick_get_drvdata(card);
 	struct mspro_param_register param = {
-		.system = 0,
+		.system = MEMSTICK_SYS_PAR4,
 		.data_count = 0,
 		.data_address = 0,
 		.tpc_param = 0
@@ -845,8 +846,24 @@ static int mspro_block_switch_to_parallel(struct memstick_dev *card)
 	wait_for_completion(&card->mrq_complete);
 
 	if (card->current_mrq.error) {
-		msb->system = 0x80;
+		msb->system = MEMSTICK_SYS_SERIAL;
+		host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_OFF);
+		msleep(1000);
+		host->set_param(host, MEMSTICK_POWER, MEMSTICK_POWER_ON);
 		host->set_param(host, MEMSTICK_INTERFACE, MEMSTICK_SERIAL);
+
+		if (memstick_set_rw_addr(card))
+			return card->current_mrq.error;
+
+		param.system = msb->system;
+
+		card->next_request = h_mspro_block_req_init;
+		msb->mrq_handler = h_mspro_block_default;
+		memstick_init_req(&card->current_mrq, MS_TPC_WRITE_REG, &param,
+				  sizeof(param));
+		memstick_new_req(host);
+		wait_for_completion(&card->mrq_complete);
+
 		return -EFAULT;
 	}
 
-- 
1.5.3.6

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