Added __printf attribute to declaration of fbtft_dbg_hex and fixed
mismatches between format-specifiers and arguments in several function
calls.

Signed-off-by: Jeremy Sowden <jer...@azazel.net>
---
Since v1:

  * fixed some mismatches that I missed but were picked up by the kbuild
    test robot.

 drivers/staging/fbtft/fb_agm1264k-fl.c |  2 +-
 drivers/staging/fbtft/fb_ra8875.c      |  2 +-
 drivers/staging/fbtft/fbtft-io.c       | 12 ++++++------
 drivers/staging/fbtft/fbtft.h          |  1 +
 drivers/staging/fbtft/fbtft_device.c   |  2 +-
 5 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/drivers/staging/fbtft/fb_agm1264k-fl.c 
b/drivers/staging/fbtft/fb_agm1264k-fl.c
index 8f27bd8da17d..d4dca3ce4db0 100644
--- a/drivers/staging/fbtft/fb_agm1264k-fl.c
+++ b/drivers/staging/fbtft/fb_agm1264k-fl.c
@@ -406,7 +406,7 @@ static int write_vmem(struct fbtft_par *par, size_t offset, 
size_t len)
 static int write(struct fbtft_par *par, void *buf, size_t len)
 {
        fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
-                         "%s(len=%d): ", __func__, len);
+                         "%s(len=%zu): ", __func__, len);
 
        gpiod_set_value(par->RW, 0); /* set write mode */
 
diff --git a/drivers/staging/fbtft/fb_ra8875.c 
b/drivers/staging/fbtft/fb_ra8875.c
index 70b37fc7fb66..398bdbf53c9a 100644
--- a/drivers/staging/fbtft/fb_ra8875.c
+++ b/drivers/staging/fbtft/fb_ra8875.c
@@ -24,7 +24,7 @@ static int write_spi(struct fbtft_par *par, void *buf, size_t 
len)
        struct spi_message m;
 
        fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
-                         "%s(len=%d): ", __func__, len);
+                         "%s(len=%zu): ", __func__, len);
 
        if (!par->spi) {
                dev_err(par->info->device,
diff --git a/drivers/staging/fbtft/fbtft-io.c b/drivers/staging/fbtft/fbtft-io.c
index 38cdad6203ea..0863d257d762 100644
--- a/drivers/staging/fbtft/fbtft-io.c
+++ b/drivers/staging/fbtft/fbtft-io.c
@@ -14,7 +14,7 @@ int fbtft_write_spi(struct fbtft_par *par, void *buf, size_t 
len)
        struct spi_message m;
 
        fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
-                         "%s(len=%d): ", __func__, len);
+                         "%s(len=%zu): ", __func__, len);
 
        if (!par->spi) {
                dev_err(par->info->device,
@@ -47,7 +47,7 @@ int fbtft_write_spi_emulate_9(struct fbtft_par *par, void 
*buf, size_t len)
        u64 val, dc, tmp;
 
        fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
-                         "%s(len=%d): ", __func__, len);
+                         "%s(len=%zu): ", __func__, len);
 
        if (!par->extra) {
                dev_err(par->info->device, "%s: error: par->extra is NULL\n",
@@ -109,7 +109,7 @@ int fbtft_read_spi(struct fbtft_par *par, void *buf, size_t 
len)
                txbuf[0] = par->startbyte | 0x3;
                t.tx_buf = txbuf;
                fbtft_par_dbg_hex(DEBUG_READ, par, par->info->device, u8,
-                                 txbuf, len, "%s(len=%d) txbuf => ",
+                                 txbuf, len, "%s(len=%zu) txbuf => ",
                                  __func__, len);
        }
 
@@ -117,7 +117,7 @@ int fbtft_read_spi(struct fbtft_par *par, void *buf, size_t 
len)
        spi_message_add_tail(&t, &m);
        ret = spi_sync(par->spi, &m);
        fbtft_par_dbg_hex(DEBUG_READ, par, par->info->device, u8, buf, len,
-                         "%s(len=%d) buf <= ", __func__, len);
+                         "%s(len=%zu) buf <= ", __func__, len);
 
        return ret;
 }
@@ -136,7 +136,7 @@ int fbtft_write_gpio8_wr(struct fbtft_par *par, void *buf, 
size_t len)
 #endif
 
        fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
-                         "%s(len=%d): ", __func__, len);
+                         "%s(len=%zu): ", __func__, len);
 
        while (len--) {
                data = *(u8 *)buf;
@@ -186,7 +186,7 @@ int fbtft_write_gpio16_wr(struct fbtft_par *par, void *buf, 
size_t len)
 #endif
 
        fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
-                         "%s(len=%d): ", __func__, len);
+                         "%s(len=%zu): ", __func__, len);
 
        while (len) {
                data = *(u16 *)buf;
diff --git a/drivers/staging/fbtft/fbtft.h b/drivers/staging/fbtft/fbtft.h
index 7fdd3b0851ef..9b6bdb62093d 100644
--- a/drivers/staging/fbtft/fbtft.h
+++ b/drivers/staging/fbtft/fbtft.h
@@ -238,6 +238,7 @@ struct fbtft_par {
 
 /* fbtft-core.c */
 int fbtft_write_buf_dc(struct fbtft_par *par, void *buf, size_t len, int dc);
+__printf(5, 6)
 void fbtft_dbg_hex(const struct device *dev, int groupsize,
                   void *buf, size_t len, const char *fmt, ...);
 struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display,
diff --git a/drivers/staging/fbtft/fbtft_device.c 
b/drivers/staging/fbtft/fbtft_device.c
index 5f6cd0816d58..44e1410eb3fe 100644
--- a/drivers/staging/fbtft/fbtft_device.c
+++ b/drivers/staging/fbtft/fbtft_device.c
@@ -965,7 +965,7 @@ static int write_gpio16_wr_slow(struct fbtft_par *par, void 
*buf, size_t len)
 #endif
 
        fbtft_par_dbg_hex(DEBUG_WRITE, par, par->info->device, u8, buf, len,
-                         "%s(len=%d): ", __func__, len);
+                         "%s(len=%zu): ", __func__, len);
 
        while (len) {
                data = *(u16 *)buf;
-- 
2.20.1

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