346 static int concat_dev_erase(struct mtd_info *mtd, struct erase_info *erase)  in concat_dev_erase()  argument
357 	erase->mtd = mtd;  in concat_dev_erase()
358 	erase->callback = concat_erase_callback;  in concat_dev_erase()
359 	erase->priv = (unsigned long) &waitq;  in concat_dev_erase()
365 	err = mtd_erase(mtd, erase);  in concat_dev_erase()
369 		if (erase->state != MTD_ERASE_DONE  in concat_dev_erase()
370 		    && erase->state != MTD_ERASE_FAILED)  in concat_dev_erase()
375 		err = (erase->state == MTD_ERASE_FAILED) ? -EIO : 0;  in concat_dev_erase()
386 	struct erase_info *erase;  in concat_erase()  local
389 	 * Check for proper erase block alignment of the to-be-erased area.  in concat_erase()
390 	 * It is easier to do this based on the super device's erase  in concat_erase()
395 		/* the easy case: device has uniform erase block size */  in concat_erase()
401 		/* device has variable erase size */  in concat_erase()
406 		 * Find the erase region where the to-be-erased area begins:  in concat_erase()
415 		 * offset is aligned to this region's erase size:  in concat_erase()
421 		 * now find the erase region where the to-be-erased area ends:  in concat_erase()
428 		 * check if the ending offset is aligned to this region's erase size  in concat_erase()
436 	erase = kmalloc(sizeof (struct erase_info), GFP_KERNEL);  in concat_erase()
438 	if (!erase)  in concat_erase()
441 	*erase = *instr;  in concat_erase()
450 		if (subdev->size <= erase->addr) {  in concat_erase()
451 			erase->addr -= subdev->size;  in concat_erase()
461 	/* now do the erase: */  in concat_erase()
468 		if (erase->addr + length > subdev->size)  in concat_erase()
469 			erase->len = subdev->size - erase->addr;  in concat_erase()
471 			erase->len = length;  in concat_erase()
473 		length -= erase->len;  in concat_erase()
474 		if ((err = concat_dev_erase(subdev, erase))) {  in concat_erase()
478 			if (erase->fail_addr != MTD_FAIL_ADDR_UNKNOWN)  in concat_erase()
479 				instr->fail_addr = erase->fail_addr + offset;  in concat_erase()
483 		 * erase->addr specifies the offset of the area to be  in concat_erase()
490 		erase->addr = 0;  in concat_erase()
493 	instr->state = erase->state;  in concat_erase()
494 	kfree(erase);  in concat_erase()
825 	 * Combine the erase block size info of the subdevices:  in mtd_concat_create()
828 	 * many changes in erase size we have  in mtd_concat_create()
834 			/* current subdevice has uniform erase size */  in mtd_concat_create()
836 				/* if it differs from the last subdevice's erase size, count it */  in mtd_concat_create()
843 			/* current subdevice has variable erase size */  in mtd_concat_create()
847 				/* walk the list of erase regions, count any changes */  in mtd_concat_create()
863 		 * All subdevices have the same uniform erase size.  in mtd_concat_create()
872 		 * erase block size varies across the subdevices: allocate  in mtd_concat_create()
873 		 * space to store the data describing the variable erase regions  in mtd_concat_create()
886 			    ("memory allocation error while creating erase region list"  in mtd_concat_create()
893 		 * in erase region info:  in mtd_concat_create()
899 				/* current subdevice has uniform erase size */  in mtd_concat_create()
918 				/* current subdevice has variable erase size */  in mtd_concat_create()
921 					/* walk the list of erase regions, count any changes */  in mtd_concat_create()