gistfile1.txt

diff --git a/spi.c b/spi.c
index 94a76a7..b5c4bde 100644
--- a/spi.c
+++ b/spi.c
@@ -104,18 +104,18 @@ int default_spi_write_256(struct flashctx *flash, uint8_t *buf,
 int spi_chip_read(struct flashctx *flash, uint8_t *buf, unsigned int start,
                  unsigned int len)
 {
-       unsigned int addrbase = 0;
+       unsigned long long addrbase = 0;

        /* Check if the chip fits between lowest valid and highest possible
         * address. Highest possible address with the current SPI implementation
-        * means 0xffffff, the highest unsigned 24bit number.
+        * means 0xffffffff
         */
        addrbase = spi_get_valid_read_addr(flash);
-       if (addrbase + flash->chip->total_size * 1024 > (1 << 24)) {
+       if (addrbase + flash->chip->total_size * 1024 > (1ULL << 32)) {
                msg_perr("Flash chip size exceeds the allowed access window. ");
                msg_perr("Read will probably fail.\n");
                /* Try to get the best alignment subject to constraints. */
-               addrbase = (1 << 24) - flash->chip->total_size * 1024;
+               addrbase = (1ULL << 32) - flash->chip->total_size * 1024;
        }
        /* Check if alignment is native (at least the largest power of two which
         * is a factor of the mapped size of the chip).