[PATCH 1/2] mmc: rtsx: Revert "mmc: rtsx: modify error handle and remove smatch warnings"

[<micky_ching@realsil.com.cn>]

From: Micky Ching <micky_ching@realsil.com.cn>

This reverts commit 1f7b581b3ffcb2a8437397a02f4af89fa6934d08.

The patch depend on commit c42deffd5b53c9e583d83c7964854ede2f12410d
<mmc: rtsx: add support for pre_req and post_req>, but the previous
patch was discard. So we have to delete the patch.

Signed-off-by: Micky Ching <micky_ching@realsil.com.cn>
---
 drivers/mmc/host/rtsx_pci_sdmmc.c |  119 +++++++++++++++++--------------------
 1 file changed, 54 insertions(+), 65 deletions(-)

diff --git a/drivers/mmc/host/rtsx_pci_sdmmc.c b/drivers/mmc/host/rtsx_pci_sdmmc.c
index 09340b9..76cfdcc 100644
--- a/drivers/mmc/host/rtsx_pci_sdmmc.c
+++ b/drivers/mmc/host/rtsx_pci_sdmmc.c
@@ -81,24 +81,25 @@ static inline void sd_clear_error(struct realtek_pci_sdmmc *host)
 }
 
 #ifdef DEBUG
-static inline void sd_print_reg(struct realtek_pci_sdmmc *host, u16 reg)
-{
-	u8 val = 0;
-
-	if (rtsx_pci_read_register(host->pcr, reg, &val) < 0)
-		dev_dbg(sdmmc_dev(host), "read 0x%04x failed\n", reg);
-	else
-		dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", reg, val);
-}
-
 static void sd_print_debug_regs(struct realtek_pci_sdmmc *host)
 {
+	struct rtsx_pcr *pcr = host->pcr;
 	u16 i;
+	u8 *ptr;
+
+	/* Print SD host internal registers */
+	rtsx_pci_init_cmd(pcr);
+	for (i = 0xFDA0; i <= 0xFDAE; i++)
+		rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
+	for (i = 0xFD52; i <= 0xFD69; i++)
+		rtsx_pci_add_cmd(pcr, READ_REG_CMD, i, 0, 0);
+	rtsx_pci_send_cmd(pcr, 100);
 
+	ptr = rtsx_pci_get_cmd_data(pcr);
 	for (i = 0xFDA0; i <= 0xFDAE; i++)
-		sd_print_reg(host, i);
+		dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
 	for (i = 0xFD52; i <= 0xFD69; i++)
-		sd_print_reg(host, i);
+		dev_dbg(sdmmc_dev(host), "0x%04X: 0x%02x\n", i, *(ptr++));
 }
 #else
 #define sd_print_debug_regs(host)
@@ -124,27 +125,19 @@ static void sd_request_timeout(unsigned long host_addr)
 	spin_lock_irqsave(&host->lock, flags);
 
 	if (!host->mrq) {
-		dev_err(sdmmc_dev(host), "error: request not exist\n");
-		spin_unlock_irqrestore(&host->lock, flags);
-		return;
+		dev_err(sdmmc_dev(host), "error: no request exist\n");
+		goto out;
 	}
 
-	if (host->cmd && host->data)
-		dev_err(sdmmc_dev(host), "error: cmd and data conflict\n");
-
-	if (host->cmd) {
+	if (host->cmd)
 		host->cmd->error = -ETIMEDOUT;
-		dev_dbg(sdmmc_dev(host), "timeout for cmd %d\n",
-			host->cmd->opcode);
-		tasklet_schedule(&host->cmd_tasklet);
-	}
-
-	if (host->data) {
+	if (host->data)
 		host->data->error = -ETIMEDOUT;
-		dev_dbg(sdmmc_dev(host), "timeout for data transfer\n");
-		tasklet_schedule(&host->data_tasklet);
-	}
 
+	dev_dbg(sdmmc_dev(host), "timeout for request\n");
+
+out:
+	tasklet_schedule(&host->finish_tasklet);
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
@@ -164,8 +157,7 @@ static void sd_finish_request(unsigned long host_addr)
 	mrq = host->mrq;
 	if (!mrq) {
 		dev_err(sdmmc_dev(host), "error: no request need finish\n");
-		spin_unlock_irqrestore(&host->lock, flags);
-		return;
+		goto out;
 	}
 
 	cmd = mrq->cmd;
@@ -175,6 +167,11 @@ static void sd_finish_request(unsigned long host_addr)
 		(mrq->stop && mrq->stop->error) ||
 		(cmd && cmd->error) || (data && data->error);
 
+	if (any_error) {
+		rtsx_pci_stop_cmd(pcr);
+		sd_clear_error(host);
+	}
+
 	if (data) {
 		if (any_error)
 			data->bytes_xfered = 0;
@@ -191,6 +188,7 @@ static void sd_finish_request(unsigned long host_addr)
 	host->cmd = NULL;
 	host->data = NULL;
 
+out:
 	spin_unlock_irqrestore(&host->lock, flags);
 	mutex_unlock(&pcr->pcr_mutex);
 	mmc_request_done(host->mmc, mrq);
@@ -375,11 +373,8 @@ static void sd_send_cmd(struct realtek_pci_sdmmc *host, struct mmc_command *cmd)
 	if (cmd->opcode == SD_SWITCH_VOLTAGE) {
 		err = rtsx_pci_write_register(pcr, SD_BUS_STAT,
 				0xFF, SD_CLK_TOGGLE_EN);
-		if (err < 0) {
-			rtsx_pci_write_register(pcr, SD_BUS_STAT,
-				SD_CLK_TOGGLE_EN | SD_CLK_FORCE_STOP, 0);
+		if (err < 0)
 			goto out;
-		}
 	}
 
 	rtsx_pci_init_cmd(pcr);
@@ -441,8 +436,7 @@ static void sd_get_rsp(unsigned long host_addr)
 
 	if (!cmd) {
 		dev_err(sdmmc_dev(host), "error: cmd not exist\n");
-		spin_unlock_irqrestore(&host->lock, flags);
-		return;
+		goto out;
 	}
 
 	spin_lock(&pcr->lock);
@@ -452,18 +446,16 @@ static void sd_get_rsp(unsigned long host_addr)
 		err = -EINVAL;
 	spin_unlock(&pcr->lock);
 
-	if (err < 0) {
-		rtsx_pci_stop_cmd(host->pcr);
-		sd_print_debug_regs(host);
-		sd_clear_error(host);
+	if (err < 0)
 		goto out;
-	}
 
 	rsp_type = host->rsp_type;
 	stat_idx = host->rsp_len;
 
-	if (rsp_type == SD_RSP_TYPE_R0)
+	if (rsp_type == SD_RSP_TYPE_R0) {
+		err = 0;
 		goto out;
+	}
 
 	/* Eliminate returned value of CHECK_REG_CMD */
 	ptr = rtsx_pci_get_cmd_data(pcr) + 1;
@@ -506,19 +498,14 @@ static void sd_get_rsp(unsigned long host_addr)
 		goto out;
 
 	if (cmd->data) {
-		err = sd_start_multi_rw(host, host->mrq);
-		if (err) {
-			cmd->data->error = err;
-			dev_err(sdmmc_dev(host),
-				"error: start data transfer failed\n");
-			tasklet_schedule(&host->data_tasklet);
-		}
+		sd_start_multi_rw(host, host->mrq);
 		spin_unlock_irqrestore(&host->lock, flags);
 		return;
 	}
 
 out:
 	cmd->error = err;
+
 	tasklet_schedule(&host->finish_tasklet);
 	spin_unlock_irqrestore(&host->lock, flags);
 }
@@ -538,7 +525,7 @@ static int sd_pre_dma_transfer(struct realtek_pci_sdmmc *host,
 		data->host_cookie = 0;
 	}
 
-	if (next || data->host_cookie != host->next_data.cookie)
+	if (next || (!next && data->host_cookie != host->next_data.cookie))
 		sg_count = rtsx_pci_dma_map_sg(pcr,
 				data->sg, data->sg_len, read);
 	else
@@ -593,6 +580,7 @@ static int sd_start_multi_rw(struct realtek_pci_sdmmc *host,
 	int uhs = mmc_card_uhs(card);
 	int read = data->flags & MMC_DATA_READ;
 	u8 cfg2, trans_mode;
+	int err;
 	size_t data_len = data->blksz * data->blocks;
 
 	if (host->data)
@@ -653,7 +641,12 @@ static int sd_start_multi_rw(struct realtek_pci_sdmmc *host,
 	mod_timer(&host->timer, jiffies + 10 * HZ);
 	rtsx_pci_send_cmd_no_wait(pcr);
 
-	return rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, read);
+	err = rtsx_pci_dma_transfer(pcr, data->sg, host->sg_count, read);
+	if (err < 0) {
+		data->error = err;
+		tasklet_schedule(&host->finish_tasklet);
+	}
+	return 0;
 }
 
 static void sd_finish_multi_rw(unsigned long host_addr)
@@ -667,9 +660,8 @@ static void sd_finish_multi_rw(unsigned long host_addr)
 	spin_lock_irqsave(&host->lock, flags);
 
 	if (!host->data) {
-		dev_err(sdmmc_dev(host), "error: data not exist\n");
-		spin_unlock_irqrestore(&host->lock, flags);
-		return;
+		dev_err(sdmmc_dev(host), "error: no data exist\n");
+		goto out;
 	}
 
 	data = host->data;
@@ -680,22 +672,19 @@ static void sd_finish_multi_rw(unsigned long host_addr)
 	else if (pcr->trans_result != TRANS_RESULT_OK)
 		err = -EINVAL;
 
-	if (err < 0)
+	if (err < 0) {
 		data->error = err;
-
-	if (data->error) {
-		rtsx_pci_stop_cmd(host->pcr);
-		sd_print_debug_regs(host);
-		sd_clear_error(host);
-		dev_dbg(sdmmc_dev(host), "data transfer failed %d\n",
-			data->error);
+		goto out;
 	}
 
-	if (!host->mrq->sbc && data->stop)
+	if (!host->mrq->sbc && data->stop) {
 		sd_send_cmd(host, data->stop);
-	else
-		tasklet_schedule(&host->finish_tasklet);
+		spin_unlock_irqrestore(&host->lock, flags);
+		return;
+	}
 
+out:
+	tasklet_schedule(&host->finish_tasklet);
 	spin_unlock_irqrestore(&host->lock, flags);
 }
 
-- 
1.7.9.5