mtd: gpmi: remove the unnecessary pr_err()

The error messages for the failure of dmaengine_prep_slave_sg are
not necessary, this patch removes all these pr_err, and returns with
the proper error code -EINVAL, not -1.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

diff --git a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
index 10a6f07..45b9a3d 100644 (file)
--- a/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
+++ b/drivers/mtd/nand/gpmi-nand/gpmi-lib.c
@@ -1128,10 +1128,8 @@ int gpmi_send_command(struct gpmi_nand_data *this)
        desc = dmaengine_prep_slave_sg(channel,
                                        (struct scatterlist *)pio,
                                        ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
-       if (!desc) {
-               pr_err("step 1 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [2] send out the COMMAND + ADDRESS string stored in @buffer */
        sgl = &this->cmd_sgl;
@@ -1141,11 +1139,8 @@ int gpmi_send_command(struct gpmi_nand_data *this)
        desc = dmaengine_prep_slave_sg(channel,
                                sgl, 1, DMA_MEM_TO_DEV,
                                DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-
-       if (!desc) {
-               pr_err("step 2 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [3] submit the DMA */
        set_dma_type(this, DMA_FOR_COMMAND);
@@ -1174,20 +1169,17 @@ int gpmi_send_data(struct gpmi_nand_data *this)
        pio[1] = 0;
        desc = dmaengine_prep_slave_sg(channel, (struct scatterlist *)pio,
                                        ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
-       if (!desc) {
-               pr_err("step 1 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [2] send DMA request */
        prepare_data_dma(this, DMA_TO_DEVICE);
        desc = dmaengine_prep_slave_sg(channel, &this->data_sgl,
                                        1, DMA_MEM_TO_DEV,
                                        DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-       if (!desc) {
-               pr_err("step 2 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
+
        /* [3] submit the DMA */
        set_dma_type(this, DMA_FOR_WRITE_DATA);
        return start_dma_without_bch_irq(this, desc);
@@ -1211,20 +1203,16 @@ int gpmi_read_data(struct gpmi_nand_data *this)
        desc = dmaengine_prep_slave_sg(channel,
                                        (struct scatterlist *)pio,
                                        ARRAY_SIZE(pio), DMA_TRANS_NONE, 0);
-       if (!desc) {
-               pr_err("step 1 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [2] : send DMA request */
        prepare_data_dma(this, DMA_FROM_DEVICE);
        desc = dmaengine_prep_slave_sg(channel, &this->data_sgl,
                                        1, DMA_DEV_TO_MEM,
                                        DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-       if (!desc) {
-               pr_err("step 2 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [3] : submit the DMA */
        set_dma_type(this, DMA_FOR_READ_DATA);
@@ -1269,10 +1257,9 @@ int gpmi_send_page(struct gpmi_nand_data *this,
                                        (struct scatterlist *)pio,
                                        ARRAY_SIZE(pio), DMA_TRANS_NONE,
                                        DMA_CTRL_ACK);
-       if (!desc) {
-               pr_err("step 2 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
+
        set_dma_type(this, DMA_FOR_WRITE_ECC_PAGE);
        return start_dma_with_bch_irq(this, desc);
 }
@@ -1304,10 +1291,8 @@ int gpmi_read_page(struct gpmi_nand_data *this,
        desc = dmaengine_prep_slave_sg(channel,
                                (struct scatterlist *)pio, 2,
                                DMA_TRANS_NONE, 0);
-       if (!desc) {
-               pr_err("step 1 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [2] Enable the BCH block and read. */
        command_mode = BV_GPMI_CTRL0_COMMAND_MODE__READ;
@@ -1334,10 +1319,8 @@ int gpmi_read_page(struct gpmi_nand_data *this,
                                        (struct scatterlist *)pio,
                                        ARRAY_SIZE(pio), DMA_TRANS_NONE,
                                        DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-       if (!desc) {
-               pr_err("step 2 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [3] Disable the BCH block */
        command_mode = BV_GPMI_CTRL0_COMMAND_MODE__WAIT_FOR_READY;
@@ -1355,10 +1338,8 @@ int gpmi_read_page(struct gpmi_nand_data *this,
                                (struct scatterlist *)pio, 3,
                                DMA_TRANS_NONE,
                                DMA_PREP_INTERRUPT | DMA_CTRL_ACK);
-       if (!desc) {
-               pr_err("step 3 error\n");
-               return -1;
-       }
+       if (!desc)
+               return -EINVAL;
 
        /* [4] submit the DMA */
        set_dma_type(this, DMA_FOR_READ_ECC_PAGE);