media: atomisp: move up sanity checks

The sanity checks were done too late, so move them up.

This fixes this smatch warning:

drivers/staging/media/atomisp/pci/sh_css_firmware.c:247 sh_css_load_firmware() warn: variable dereferenced before check 'fw_data' (see line 237)

Link: https://lore.kernel.org/r/20230524121150.435736-9-hverkuil-cisco@xs4all.nlSigned-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>

drivers/staging/media/atomisp/pci/sh_css_firmware.c

@@ -233,8 +233,16 @@ sh_css_load_firmware(struct device *dev, const char *fw_data,
 	struct sh_css_fw_bi_file_h *file_header;
 	int ret;
 
+	/* some sanity checks */
+	if (!fw_data || fw_size < sizeof(struct sh_css_fw_bi_file_h))
+		return -EINVAL;
+
 	firmware_header = (struct firmware_header *)fw_data;
 	file_header = &firmware_header->file_header;
+
+	if (file_header->h_size != sizeof(struct sh_css_fw_bi_file_h))
+		return -EINVAL;
+
 	binaries = &firmware_header->binary_header;
 	strscpy(FW_rel_ver_name, file_header->version,
 		min(sizeof(FW_rel_ver_name), sizeof(file_header->version)));
@@ -251,13 +259,6 @@ sh_css_load_firmware(struct device *dev, const char *fw_data,
 		IA_CSS_LOG("successfully load firmware version %s", release_version);
 	}
 
-	/* some sanity checks */
-	if (!fw_data || fw_size < sizeof(struct sh_css_fw_bi_file_h))
-		return -EINVAL;
-
-	if (file_header->h_size != sizeof(struct sh_css_fw_bi_file_h))
-		return -EINVAL;
-
 	sh_css_num_binaries = file_header->binary_nr;
 	/* Only allocate memory for ISP blob info */
 	if (sh_css_num_binaries > NUM_OF_SPS) {