Merge tag 'nand/for-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux into mtd/next

NAND core changes:
- use longest matching pattern in ->exec_op() default parser
- export NAND operation tracer
- add flag to indicate panic_write in MTD
- use kzalloc() instead of kmalloc() and memset()

Raw NAND controller drivers changes:
- brcmnand:
  * fix BCH ECC layout for large page NAND parts
  * fallback to detected ecc-strength, ecc-step-size
  * when oops in progress use pio and interrupt polling
  * code refactor code to introduce helper functions
  * add support for v7.3 controller
- FSMC:
  * use nand_op_trace for operation tracing
- GPMI:
  * move all driver code into single file
  * various cleanups (including dmaengine changes)
  * use runtime PM to manage clocks
  * implement exec_op
- MTK:
  * correct low level time calculation of r/w cycle
  * improve data sampling timing for read cycle
  * add validity check for CE# pin setting
  * fix wrongly assigned OOB buffer pointer issue
  * re-license MTK NAND driver as Dual MIT/GPL
- STM32:
  * manage the get_irq error case
  * increase DMA completion timeouts

Raw NAND chips drivers changes:
- Macronix: add read-retry support

Onenand driver changes:
- add support for 8Gb datasize chips
- avoid fall-through warnings

SPI-NAND changes:
- define macros for page-read ops with three-byte addresses
- add support for two-byte device IDs and then for GigaDevice
  GD5F1GQ4UFxxG
- add initial support for Paragon PN26G0xA
- handle the case where the last page read has bitflips

1 files changed, 38 insertions, 42 deletions

diff --git a/drivers/mtd/nand/raw/nand_base.c b/drivers/mtd/nand/raw/nand_base.c
index 2cf71060d6f8..6ecd1c496ce3 100644
--- a/drivers/mtd/nand/raw/nand_base.c
+++ b/drivers/mtd/nand/raw/nand_base.c
@@ -2115,35 +2115,7 @@ static void nand_op_parser_trace(const struct nand_op_parser_ctx *ctx)
 		if (instr == &ctx->subop.instrs[0])
 			prefix = "    ->";
 
-		switch (instr->type) {
-		case NAND_OP_CMD_INSTR:
-			pr_debug("%sCMD      [0x%02x]\n", prefix,
-				 instr->ctx.cmd.opcode);
-			break;
-		case NAND_OP_ADDR_INSTR:
-			pr_debug("%sADDR     [%d cyc: %*ph]\n", prefix,
-				 instr->ctx.addr.naddrs,
-				 instr->ctx.addr.naddrs < 64 ?
-				 instr->ctx.addr.naddrs : 64,
-				 instr->ctx.addr.addrs);
-			break;
-		case NAND_OP_DATA_IN_INSTR:
-			pr_debug("%sDATA_IN  [%d B%s]\n", prefix,
-				 instr->ctx.data.len,
-				 instr->ctx.data.force_8bit ?
-				 ", force 8-bit" : "");
-			break;
-		case NAND_OP_DATA_OUT_INSTR:
-			pr_debug("%sDATA_OUT [%d B%s]\n", prefix,
-				 instr->ctx.data.len,
-				 instr->ctx.data.force_8bit ?
-				 ", force 8-bit" : "");
-			break;
-		case NAND_OP_WAITRDY_INSTR:
-			pr_debug("%sWAITRDY  [max %d ms]\n", prefix,
-				 instr->ctx.waitrdy.timeout_ms);
-			break;
-		}
+		nand_op_trace(prefix, instr);
 
 		if (instr == &ctx->subop.instrs[ctx->subop.ninstrs - 1])
 			prefix = "      ";
@@ -2156,6 +2128,22 @@ static void nand_op_parser_trace(const struct nand_op_parser_ctx *ctx)
 }
 #endif
 
+static int nand_op_parser_cmp_ctx(const struct nand_op_parser_ctx *a,
+				  const struct nand_op_parser_ctx *b)
+{
+	if (a->subop.ninstrs < b->subop.ninstrs)
+		return -1;
+	else if (a->subop.ninstrs > b->subop.ninstrs)
+		return 1;
+
+	if (a->subop.last_instr_end_off < b->subop.last_instr_end_off)
+		return -1;
+	else if (a->subop.last_instr_end_off > b->subop.last_instr_end_off)
+		return 1;
+
+	return 0;
+}
+
 /**
  * nand_op_parser_exec_op - exec_op parser
  * @chip: the NAND chip
@@ -2190,32 +2178,40 @@ int nand_op_parser_exec_op(struct nand_chip *chip,
 	unsigned int i;
 
 	while (ctx.subop.instrs < op->instrs + op->ninstrs) {
-		int ret;
+		const struct nand_op_parser_pattern *pattern;
+		struct nand_op_parser_ctx best_ctx;
+		int ret, best_pattern = -1;
 
 		for (i = 0; i < parser->npatterns; i++) {
-			const struct nand_op_parser_pattern *pattern;
+			struct nand_op_parser_ctx test_ctx = ctx;
 
 			pattern = &parser->patterns[i];
-			if (!nand_op_parser_match_pat(pattern, &ctx))
+			if (!nand_op_parser_match_pat(pattern, &test_ctx))
 				continue;
 
-			nand_op_parser_trace(&ctx);
-
-			if (check_only)
-				break;
-
-			ret = pattern->exec(chip, &ctx.subop);
-			if (ret)
-				return ret;
+			if (best_pattern >= 0 &&
+			    nand_op_parser_cmp_ctx(&test_ctx, &best_ctx) <= 0)
+				continue;
 
-			break;
+			best_pattern = i;
+			best_ctx = test_ctx;
 		}
 
-		if (i == parser->npatterns) {
+		if (best_pattern < 0) {
 			pr_debug("->exec_op() parser: pattern not found!\n");
 			return -ENOTSUPP;
 		}
 
+		ctx = best_ctx;
+		nand_op_parser_trace(&ctx);
+
+		if (!check_only) {
+			pattern = &parser->patterns[best_pattern];
+			ret = pattern->exec(chip, &ctx.subop);
+			if (ret)
+				return ret;
+		}
+
 		/*
 		 * Update the context structure by pointing to the start of the
 		 * next subop.